CodeLite is an open source, free, cross platform IDE for the C/C++ programming languages which runs on all major Platforms. It has generic support for compilers with built-in support for GCC/clang/VC++, GDB Support,  Refactoring, Code Navigation,  Source Control Plugins,  RAD Tool for wxWidgets,  Code Completion and lot more. 

CodeLite - Cross Platform IDE for C/C++

Panda3D is a game engine, a framework for 3D rendering and game development for Python and C++ program. It  featues include Exposes Full Power of Graphics API,  Powerful interface between shaders and engine,  Support for tessellation and compute shaders,  Fullscreen filters such as Bloom, Cartoon Inking, Volumetric Lightning, Blur/Sharpen and Ambient Occlusion, as well as the ability to use your own, Get models from your 3d modeller to Panda3D easily, Several options for adding sounds, physics simulation to your game. 

panda3d - Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU

Web-based PostgreSQL database browser written in Go.Pgweb is a web-based database browser for PostgreSQL, written in Go and works on OSX, Linux and Windows machines. Main idea behind using Go for backend development is to utilize ability of the compiler to produce zero-dependency binaries for multiple platforms. Pgweb was created as an attempt to build very simple and portable application to work with local or remote PostgreSQL databases.
 
<ul>
<li>Cross-platform support OSX/Linux/Windows 32/64-bit</li>
<li>Simple installation (distributed as a single binary)</li>
<li>Zero dependencies</li>
<li>Works with PostgreSQL 9.1+</li>
<li>SSH Connections</li>
<li>Multiple database sessions</li>
<li>Simple database browser</li>
<li>Execute and analyze custom SQL queries</li>
<li>Table and query data export to CSV/JSON/XML</li>
<li>Query history</li>
<li>Server bookmarks</li>
</ul>

Pgweb is a web-based database browser for PostgreSQL, written in Go. Main idea behind using Go for backend development is to utilize ability of the compiler to produce zero-dependency binaries for multiple platforms. Pgweb was created as an attempt to build very simple and portable application to work with local or remote PostgreSQL databases.

pgweb - Web-based PostgreSQL database browser written in Go

One framework for creating powerful cross-platform games. The spiritual successor to XNA with 1000's of titles shipped across desktop, mobile, and console platforms. MonoGame is a fully managed .NET open source game framework without any black boxes. Create, develop and distribute your games your way. It is an Open Source implementation of the Microsoft XNA 4 Framework. Our goal is to allow XNA developers on Xbox 360, Windows & Windows Phone to port their games to any platform 

MonoGame - One framework for creating powerful cross-platform games.

Micro is a terminal-based text editor that aims to be easy to use and intuitive, while also taking advantage of the full capabilities of modern terminals. It comes as one single, batteries-included, static binary with no dependencies, and you can download and use it right now.As the name indicates, micro aims to be somewhat of a successor to the nano editor by being easy to install and use in a pinch, but micro also aims to be enjoyable to use full time, whether you work in the terminal because you prefer it (like me), or because you need to (over ssh).

Micro is a terminal-based text editor that aims to be easy to use and intuitive, while also taking advantage of the full capabilities of modern terminals. It comes as one single, batteries-included, static binary with no dependencies, and you can download and use it right now. As the name indicates, micro aims to be somewhat of a successor to the nano editor by being easy to install and use in a pinch, but micro also aims to be enjoyable to use full time, whether you work in the terminal because you prefer it (like me), or because you need to (over ssh).

Micro - A modern and intuitive terminal-based text editor

Vue Native is a framework to build cross platform native mobile apps using JavaScript. It is a wrapper around the APIs of React Native. So, with Vue Native, you can do everything that you can do with React Native. With Vue Native, you get the simplicity of Vue.js and the seamless interop with React Native.


Vue Native - Framework to build cross platform native mobile apps using JavaScript

DB Browser for SQLite (DB4S) is a high quality, visual, open source tool to create, design, and edit database files compatible with SQLite. It is for users and developers wanting to create databases, search, and edit data. It uses a familiar spreadsheet-like interface, and you don't need to learn complicated SQL commands.
 
Its feature include: 
<ul dir="auto">
<li>Create and compact database files</li>
<li>Create, define, modify and delete tables</li>
<li>Create, define, and delete indexes</li>
<li>Browse, edit, add, and delete records</li>
<li>Search records</li>
<li>Import and export records as text</li>
<li>Import and export tables from/to CSV files</li>
<li>Import and export databases from/to SQL dump files</li>
<li>Issue SQL queries and inspect the results</li>
<li>Examine a log of all SQL commands issued by the application</li>
<li>Plot simple graphs based on table or query data</li>
</ul>

DB Browser for SQLite (DB4S) is a high quality, visual, open source tool to create, design, and edit database files compatible with SQLite. It is for users and developers wanting to create databases, search, and edit data. It uses a familiar spreadsheet-like interface, and you don't need to learn complicated SQL commands.

SQLiteBrowser- DB Browser for SQLite (DB4S) project

Spacedrive is an open source cross-platform file manager, powered by a virtual distributed filesystem written in Rust. Organize files across many devices in one place. From cloud services to offline hard drives, Spacedrive combines the storage capacity and processing power of your devices into one personal distributed cloud, that is both secure and intuitive to use.
Create photo albums that you'll never lose, effortlessly catalogue terabytes of video, move files between devices dynamically to optimize space and redundancy, generate preview media for easy viewing, automate security and encryption. Beyond being an opinionated, swiss army knife file explorer, Spacedrive is a personal database. It identifies your files uniquely, understanding more file types than any operating system.&nbsp;
Spacedrive is not a storage provider, Spacedrive is simply a database that exists on top of existing storage layers, from cloud services like Dropbox, Google Drive and iCloud to physical devices and external drives you already own. It doesn't provide you more storage, rather a supercharged view of your existing storage.

Spacedrive is an open source cross-platform file explorer, powered by a virtual distributed filesystem written in Rust.



Spacedrive - Cross Platform File Explorer

AirSim is a simulator for drones (and soon other vehicles) built on Unreal Engine. It is open-source, cross platform and supports hardware-in-loop with popular flight controllers such as PX4 for physically and visually realistic simulations. It is developed as an Unreal plugin that can simply be dropped in to any Unreal environment you want.
 
Our goal is to develop AirSim as a platform for AI research to experiment with deep learning, computer vision and reinforcement learning algorithms for autonomous vehicles. For this purpose, AirSim also exposes APIs to retrieve data and control vehicles in a platform independent way.

AirSim is a simulator for drones (and soon other vehicles) built on Unreal Engine. It is open-source, cross platform and supports hardware-in-loop with popular flight controllers such as PX4 for physically and visually realistic simulations. It is developed as an Unreal plugin that can simply be dropped in to any Unreal environment you want.

AirSim - Open source simulator based on Unreal Engine for autonomous vehicles from Microsoft AI & Research

Tusk is an unofficial, featureful, open source, community-driven, free Evernote app used by people in more than 140 countries.It has support Multiple themes, Local & Global Customizable Keyboard Shortcuts, Scalable Interface, Export Notes as PDF, HTML & Markdown Files, Drag and Drag files.

Tusk - Refined Evernote desktop app

Haxe is an open source toolkit that allows you to easily build cross-platform tools and applications that target many mainstream platforms.
<ul>
<li>The Haxe programming language, a modern, high-level, strictly-typed programming language</li>
<li>The Haxe cross-compiler, a state-of-the-art, lightning-speed compiler for many targets</li>
<li>The Haxe standard library, a complete, cross-platform library of common functionality</li>
</ul>
It helps to compile following targets
<ul>
<li>JavaScript</li>
<li>C++</li>
<li>C#</li>
<li><a href="http://hashlink.haxe.org/">HashLink</a></li>
<li>Java</li>
<li>Lua</li>
<li>PHP</li>
<li>Python 3</li>
<li><a href="http://nekovm.org/">NekoVM</a></li>
<li>Flash</li>
<li>ActionScript 3</li>
</ul>

Haxe is an open source toolkit that allows you to easily build cross-platform tools and applications that target many mainstream platforms.

Haxe - The Cross-Platform Toolkit

A cross-platform graphical process/system monitor with a customizable interface and a multitude of features. Inspired by both gtop and gotop.

bottom - Yet another cross-platform graphical process/system monitor

libass is a portable subtitle renderer for the ASS/SSA (Advanced Substation Alpha/Substation Alpha) subtitle format. It is mostly compatible with VSFilter.

libass - A portable subtitle renderer for the ASS/SSA (Advanced Substation Alpha/Substation Alpha) subtitle format

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