When you first launched Minetest, didn't you think it was just Minecraft? Actually not. Although their interface, style, and gameplay are almost the same, Minetest is essentially a free, open-source and cross-platform voxel game engine (written in C++ and Lua, using the Irrlicht Engine). It was created by Perttu Ahola and first released in 2010, and is now developed by a team of volunteers, with significant contributions from the community. It's available for Linux-based systems, FreeBSD, Windows, Mac, and Android platforms, and provides an API for users to create their own games and mods written in Lua.

PlayMaker is a very popular visual scripting tool (based on finite-state machine, FSM for short), also a hierarchical logic framework for Unity, developed by Hutong Games from China. Game designers and programmers can use PlayMaker to conduct interactive development with Unity, and quickly complete prototyping of games. Therefore, it is suitable for both independent developers and team collaboration, greatly improving the game development efficiency.

Adobe Flash Builder (formerly called Adobe Flex Builder) is an RIAs (Rich Internet Applications) and cross-platform (Android, iOS, Windows, Mac) desktop applications IDE (Integrated Development Environment) for Windows and Mac, written in Java, built on the Eclipse platform. It was used to build games and applications with the ActionScript language and the open-source Adobe Flex framework.

The greatest benefit of portable software is that there are no compatibility issues with various system versions. The packaged application always runs in isolation from the operating system running this application, and has its own registry and file systems for reading and writing data. As a result, portable software can use different versions of the same software on the same computer without affecting the system's registry or file system, ensuring its security and integrity. This way, you can even use untrusted applications without any risk to your system environment.

WireframeSketcher is a wireframe, mockup and prototype creating tool for Windows, Mac and Linux platforms, developed by Peter Severin from Romania in 2008. It can help designers, developers and product managers quickly create wireframes, interface models and UI prototypes with hand-drawn styles for desktop, Web and mobile applications.