WinStars is a free and very excellent virtual planetarium application for Windows, Mac, Linux, Android, iOS and Raspberry Pi platforms, developed by Franck RICHARD from France. It can be regarded as one of the most thoughtful and professional three-dimensional solar system simulation observation tools to date, and is suitable for teaching, entertainment, and viewing.

Paprika Recipe Manager is a practical personal recipe management application for Windows, Mac and mobile platforms. It does not come with its own recipes, but allows users to download recipe information from a large number of recipe websites with one click or manually create recipes, then saves them in the app, and provides a series of follow-up management functions. If you like to cook, it will be very useful for you.

WSV3 is a high performance weather tracking and forecasting software based on 3D map. It bills itself as the ultimate Swiss Army Knife for weather tracking/monitoring information, and the world's most advanced weather forecasting software. It uses really real-time and up-to-date radar data and weather analysis to track all kinds of severe weather conditions, e.g.: tornadoes, lightning and hail, ice and snow, hurricanes, floods and rainfall.

Mnemosyne is a free, open-source and spaced-repetition (an evidence-based learning technique) flashcard program for Windows, Mac, Linux and mobile platforms, developed by Peter Bienstman from Belgium in 2003, written in Python. It can help you learn as efficiently as possible, i.e.: optimizes your learning process. Besides, it's also a research project into the nature of long-term memory.

STL Tracker (full name: Sumus Technology Limited Tracker, Tracker for short) is a new generation of real-time satellite tracking software for Windows, developed by Sumus Technology Limited from Canada. It can connect to many satellites, and allows users to quickly and easily track any number of satellites in a variety of graphical and textual views.