Command line and GUI tools for producing Java source code from Android Dex and Apk files
      
        decompile Dalvik bytecode to java classes from APK, dex, aar, aab and zip files
        decode AndroidManifest.xml and other resources from resources.arsc
        deobfuscator included
        view decompiled code with highlighted syntax
        jump to declaration
        find usage
        full text search
        smali debugger
      
    

JADX

SQuirreL SQL Client is a graphical Java program (GUI) that will allow you to view the structure of a JDBC compliant database, browse the data in tables, issue SQL commands etc. The Flatpak version currently includes drivers for MySQL, PostgreSQL, MariaDB, Actian Avalanche, Apache Derby, H2, HSQLDB, Microsoft MSSQL, Sybase, Mckoi, and SQLite.

SQuirreL SQL Client

SQuirreL SQL Client is a GUI that allows you to view the structure of a JDBC compliant database, browse the data in tables, issue SQL commands etc. Supports MySQL, PostgreSQL, MariaDB, and SQLite.

Apache JMeter may be used to test performance both on static and dynamic resources, Web dynamic applications.
      It can be used to simulate a heavy load on a server, group of servers, network or object to test its strength or to analyze overall performance under different load types.
      Flatpak version have this changes:
      
        Open and save JMX files: the user Documents folder (use Flatseal to allow acces to other folders)
        Plugins directory: ~/.var/app/org.apache.jmeter/data/jmeter/lib/ext/
        User configuration: ~/.var/app/org.apache.jmeter/config/jmeter/user.properties
        Application log: ~/.var/app/org.apache.jmeter/.local/state/jmeter/jmeter.log
      
    

Apache JMeter

Godots is the ultimate hub for managing your Godot versions and projects.Download different versions of Godot and work across multiple projects with gdscript or the integrated C# support.

Godots

Biblioteca lets you browse and read GNOME documentation. Among other things, Biblioteca comes with
      
        Offline documentation
        Web browsing
        Tabs
        Dark mode support
        Fuzzy search
        Mobile / adaptive
      
    

Biblioteca

Glade is a RAD tool to enable quick &amp; easy development of user interfaces for the GTK+ 3 toolkit and the GNOME desktop environment.The user interfaces designed in Glade are saved as XML and these can be loaded by applications dynamically as needed by using GtkBuilder or used directly to define a new GtkWidget derived object class using GTK+ new template feature.By using GtkBuilder, Glade XML files can be used in numerous programming languages including C, C++, C#, Vala, Java, Perl, Python, and others.

Glade

Create or open user interface designs for GTK+ applications

SoapUI is the world's leading Functional Testing tool for SOAP and REST testing. With its easy-to-use graphical interface, and enterprise-class features, SoapUI allows you to easily and rapidly create and execute automated functional, regression, and load tests.
      Folders used:
      
        Open and save files: the user Documents folder (use Flatseal to allow acces to other folders)
        User directory for settings, actions, listeners, extensions and plugins: ~/.var/app/org.soapui.SoapUI/.soapuios/
      
    

SoapUI Open Source

Playhouse make it easy to prototype, teach, design, learn and build Web things.HTML/CSS/JavaScript editorsauto-savelive Web previewstandard keyboard shortcutsdeveloper toolsdark/light mode support

Playhouse


      SmartGit is a graphical Git client with support for SVN and Pull Requests for GitHub and Bitbucket. SmartGit runs
      on Windows, macOS and Linux.
    
      
      SmartGit comes with special integrations for GitHub, BitBucket and BitBucket Server (former Atlassian Stash) to
      create and resolve Pull Requests and Review Comments. Of course, you can use SmartGit like any other Git client
      with your own Git repositories or other hosting providers (e.g. GitLab).
    
      NOTE: This wrapper is not verified by, affiliated with, or supported by syntevo GmbH.
    

SmartGit

Upload, download, and manage Azure blobs, files, queues, and tables, as well as Azure Cosmos DB and Azure Data Lake Storage entities.
    Easily access virtual machine disks, and work with either Azure Resource Manager or classic storage accounts. Manage and configure
    cross-origin resource sharing rules.
      NOTE: This wrapper is not verified by, affiliated with, or supported by Microsoft.
    

Azure Storage Explorer

Graphical tool to manage Azure cloud storage resources

PdfJumbler is a simple tool to rearrange, merge, delete and rotate pages in PDF files.

PdfJumbler

Simple tool to rearrange, merge, delete and rotate pages in PDF files

Free and open source hex viewer/editor written in Java.Features:Visualize data as numerical (hexadecimal) codes and text representationCodes can be also binary, octal or decimalSupport for Unicode, UTF-8 and other charsetsInsert and overwrite edit modesSearching for text / hexadecimal code with matching highlightingSupport for undo/redoSupport for files with size up to exabytes

BinEd

FlashPrint is a beginner-friendly slicer developped in-house by Flashforge for use
      with its line of 3D printers, featuring a 3D viewer, scaling and cutting abilities,
      and multiple printer related configuration options. It also sports an expert mode for
      more experienced users.
      NOTE: This wrapper is not verified by, affiliated with, or supported by FlashForge.
    

FlashPrint

Commit is an editor that helps you write better Git and Mercurial commit messages.After installing make sure to launch the application and follow the instructions.Commit will pop up automatically when you make a commit in one of your projects. To save your commit message, press the Commit button or the &lt;code&gt;Ctrl+Return&lt;/code&gt; shortcut. To abort and dismiss Commit, press the Abort button or the &lt;code&gt;Escape&lt;/code&gt; key.Features:Highlights overflow of the commit titleSmart body wrappingInserts a blank line between title and bodySpell checkingComments are read-only and excluded from "Select All"Displays project folder and branch in window headerDark mode supportKeyboard navigation and shortcutsUndo/Redo supportEmoji pickerSupports git commit, merge, tag --annotate, add --patch, rebase --interactiveSupports Mercurial commitAuto capitalize the commit titleWelcome window with settings and instructionsHighlight syntax for Git, Mercurial and diffs

Commit

Compress your images with ease without the cost of loosing the images quality using JpegOptim and OptiPng.Features:Compress bmp, jpg / jpeg, png, pnm and tiff with lossless compressionWorks offline, always ready where and whenever neededA clean interface, optimize your images effortlesslyEasily quit the application by pressing Ctrl + Q

Image Optimizer

Processing is the first easy-to-use software sketching platform created by C. Reas and B. Fry and supported by the Processing Foundation.Included is an integrated development environment that can be used to develop interactive applications using different programming languages but mainly Java, Android, Python, and Javascript.Known issues:Python sketches can run but you may have trouble stopping them running. If so, you will have to use your system monitor application of choice (such as htop) to close the sketch, as it will be the only way to stop the sketch, other than closing the IDE itself. This problem also persists outside of Flatpak. See: https://github.com/flathub/org.processing.processingide/issues/5When trying to open a Python sketch other than an example sketch in the "Examples" dialog, the IDE may crash and close by itself. This problem also persists outside of Flatpak. See: https://github.com/benfry/processing4/issues/793Python Mode for Processing is currently unmaintained and a new maintainer is currently being sought after. It can still be downloaded and run via the Contribution Manager by going to the mode selection dialog and clicking "Mode Manager -&gt; Modes -&gt; Python Mode for Processing 4 -&gt; Install". See: https://github.com/jdf/processing.py/blob/1932b4ca71f3befd333cc23d3a1c8fe7617014ff/README.markdown#this-project-is-not-maintained

Processing IDE

Open-source software prototyping platform

Here's where GitFiends at feature-wise and what's coming up next.
      
        Git basics: Instant refresh, glance-able overview of repo state, clone, init, fetch,
        auto-fetch, push, pull, stage and commit
        Stashing: Stashing, un-stashing, stashing of selected files, hunks and specific lines
        Branching: Merge, switch, create, delete and compare in branches view
        Tags
        Remotes: Add, remove or select which remote to pull and push to
        Resolve merge conflicts: Select specific files, hunks or lines to include. Lines can be
        rearranged
        Undo: Undo un-pushed commits. Revert commits
        Cherry-pick
        Filter commits: Filter commits by branch or user
        History for a specific file: Apply a file filter and navigate through all commits with
        changes for that file
        Search: Quickly search through history for code, commits, messages, users and branches.
        Git submodules/multi-repo: Preview feature. Open a folder of repos, see the status of each
        and run bulk actions such as fetch/pull/push and create branch.
      
    

GitFiend

A versatile test tool running on Windows/Linux/macOS/Android.
      Works as data transceiver/realtime plotter/shortcut/file transceiver.
      Supports serial port, Bluetooth SPP client/server, Bluetooth LE client, TCP client/server, UDP.
    

SerialTest

A cross-platform test tool for serial port, Bluetooth, TCP and UDP


      git-cola is a simple, powerful, and feature-rich GUI for git that provides an easy way to interact with Git repositories.
    
    

Git Cola

Seabird is the native desktop app that simplifies working with Kubernetes.
    

Seabird

Zeal is a simple offline documentation browser inspired by Dash. It offers access to over 200 docsets covering various libraries and APIs.
    

Zeal

Twine is an open-source tool for telling interactive, nonlinear stories.
      You don't need to write any code to create a simple story with Twine, but you can extend your stories with variables, conditional logic, images, CSS, and JavaScript when you're ready.
      Twine publishes directly to HTML, so you can post your work nearly anywhere. Anything you create with it is completely free to use any way you like, including for commercial purposes.
      Twine was originally created by Chris Klimas in 2009 and is now maintained by a whole bunch of people at several different repositories.
    

Twine

Twine is an open-source tool for telling interactive, nonlinear stories


			SLADE3 is a modern editor for Doom-engine based games and source ports. It has the ability to view, modify, and write many different game-specific formats, and even convert between some of them, or from/to other generic formats such as PNG.
		
      
			SLADE3 can be considered a successor to both SLumpEd and SLADE - it combines the features of both, to create an all-in-one editor. Why does it keep the name of what was previously just a map editor? Because it fits :)
		
      
			As with SLumpEd and previous versions of SLADE, SLADE3 is fully cross-platform. It can be run on various operating systems, including Windows, Linux and Mac OS/X. So no matter your preferred OS, SLADE3 is available for you.
		
    

SLADE

GB Studio is drag and drop game creator for making Game Boy games
      It is designed to be usable by people with little to no previous programming knowledge using simple visual scripting but also provides multiple access points for advanced users to access the game engine's virtual machine (GBVM) and to directly modify game engine's C and Z80 assembly code through plugins.
      You can generate ROM files that can be run in an emulator, on a web page or on real Game Boy hardware
    

GB Studio

A quick and easy to use drag and drop retro game creator for Game Boy

Flatpak developer demo application is a companion to the Flatpak developer documentation. It is an example of how to use Flatpak to build and distribute an application, and can be used as a reference implementation.While the demo application uses Qt and the KDE runtime, the basic principles that it demonstrates are applicable to applications that use other runtimes and toolkits.The application demonstrates the use of portals, showing how it is possible to securely access host functions like file choosers, notifications and screenshots. To do this, it uses the built-in support provided by the Qt toolkit. Similar support is also available for GTK.

Flatpak Developer Demo

Pyzo is a cross-platform Python IDE focused on interactivity and introspection, which makes it very suitable for scientific computing. Its practical design is aimed at simplicity and efficiency.It consists of two main components, the editor and the shell, and uses a set of pluggable tools to help the programmer in various ways. Some example tools are source structure, project manager, interactive help, workspace ...Pyzo is written in (pure) Python 3 and uses the Qt GUI toolkit. Binaries are provided for all major operating system. After installing Pyzo, it can be used to execute code on any Python version available on your system (Python 2.4 - 3.x, including Pypy).

Pyzo

A Python IDE aimed at simplicity and interactivity

Cutter is a free and open-source GUI for Rizin. Willing to create an advanced, customizable and free reverse engineering framework.
    

Cutter

Free and Open Source Reverse Engineering Platform powered by Rizin and Qt


      Kompare is a GUI front-end program that enables differences between source files to be viewed and merged. It can be used to compare differences on files or the contents of folders, and it supports a variety of diff formats and provide many options to customize the information level displayed.
    
      Features:
      
        Comparing differences on files or the contents of folders recursively.
        Supports a variety of diff formats and provides many options to customize the information level displayed.
        Creating and applying patches.
      
    

Kompare

JD-GUI is a standalone graphical utility that displays Java source codes of ".class" files. You can browse the reconstructed source code with the JD-GUI for instant access to methods and fields.
    

JD-GUI

A standalone graphical utility that displays Java sources from CLASS files


        CraftOS-PC is a fantasy terminal that allows you to write and run 
        programs inside an '80s-style text console.
    
      
        CraftOS-PC emulates the popular Minecraft mod "ComputerCraft", which 
        adds programmable computers to Minecraft using the Lua programming 
        language. CraftOS-PC takes this experience outside Minecraft to allow 
        you to run the same programs anywhere you go.
    
      
        CraftOS-PC provides a set of functions (called APIs) that make it super 
        easy to do simple tasks such as write text to the screen, read files, 
        and more. The simplicity of these functions makes CraftOS-PC great for 
        new programmers, but their power makes it possible to write all sorts of
        complex programs with less code.
    
      
        If you aren't ready to write programs yet, there's already a large 
        number of programs for ComputerCraft that will work in CraftOS-PC, 
        ranging from simple games to whole graphical operating systems. These 
        can be downloaded through the built-in Pastebin and GitHub Gist clients.
    
    

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