DiskCryptor is a free and open-source full-disk encryption solution for Windows, developed by Xanasoft (DavidXanatos) from Austria, the creator of Sandboxie. It can encrypt entire hard drives, individual partitions, or external storage devices. It was originally developed as a free alternative to DriveCrypt Plus Pack (developed by SecurStar) and PGP WDE (Whole Disk Encryption, developed by Symantec). The latter two have long stopped development, while it is constantly being updated and maintained by a team of developers, ensuring that it stays secure against any potential vulnerabilities.

GNS3 (short for Graphical Network Simulator-3) is a cutting-edge and feature-rich network simulation platform for Windows, Mac and Linux platforms, developed by SolarWinds from Canada in 2008. It allows users to create virtual network environments and test various network configurations with ease.

TVBox is a very powerful Internet movie and TV application for various Android devices (especially suitable for smart TVs and TV boxes), developed by o0HalfLife0o from China. It is extremely simple to use: install, run, find and enter a valid video playback source address, then you can watch a large number of high-definition film and television resources for free. Even better, it's completely free, open-source and has no ads or functional restrictions, and no membership required.

amaze is a Qt-based GUI app for Windows and Linux platforms, used to easily generate simple mazes of square, triangular, six- or eight-sided tiles. You can also print the generated maze, save it as a picture file, or convert it to a 3D model.

F-Droid is an installable catalogue of FOSS (Free and Open-Source Software) applications for Android platform, founded by Ciaran Gultnieks from United Kingdom in 2010. It is community driven, and makes it easy to browse, install and keep track of application updates on your Android devices.