VariCAD is a lightweight, comprehensive, fast, and user-friendly 2D/3D CAD system from Czech Republic, specially designed for mechanical and electrical engineering design. It enables designers to quickly create, evaluate, and modify their models by providing users with everything necessary for mechanical designing work.

Syncovery (formerly called Super Flexible File Synchronizer) is currently the most powerful and flexible real-time, automatic synchronization & backup tool, developed by Super Flexible Software from Germany. Since Version 6, it has changed to use now easier to remember and understand new name Syncovery, but its functions are exactly the same as Super Flexible File Synchronizer.

In the past, to play a game for some platform on a computer, you have to find a corresponding console emulator to run it, and the necessary settings of each emulator vary. Some are very simple, while others may be more complex. This can be troublesome even for video game lovers who are fond of doing things from side to side. Fortunately, the appearance of RetroArch makes it more convenient for playing the classic video games on various platforms (a wide range of computers and game consoles) - within the same, lick and friendly GUI, as well as unified settings (so all configuration will be done once and for all).

Modo (AKA: The Foundry MODO) is a professional, comprehensive, and flexible 3D modeling, texturing and rendering toolset developed by The Foundry Visionmongers (Foundry for short) from United Kingdom. It integrates advanced polygon subdivision surface, modeling, sculpturing, 3D drawing, animating and rendering in one place, and serves as a comprehensive and complete software solution for many design and creativity links.

Kerkythea is a completely free, high-quality and fast 3D models render for Windows, Mac OS X and Linux platforms, developed by Ioannis Pantazopoulos from Greece. I found this free render engine in the process of studying SketchUp (by reading Architectural Design with SketchUp). In the end, it passed the software quality audit of AppNee, thus can be shared with more users around the world. Although it is a free software and not as popular as other renders, the functions of Kerkythea are not inferior in any respect. To some extent, it can be a preferred rendering tool for many small companies.