Warzone 2100 - трехмерная военная стратегия реального времени, действия которой происходят в 2085-2100 годах. Игроку предстоит возводить постройки, изучать новые технологии, собирать армию и воевать. Прямо во время игры можно создавать собственные боевые единицы, выбирать кузов, шасси, оружие.
Warzone 2100 предлагает кампании, масштабность, многопользовательский и одиночный режимы игры, дизайнерский подход к оформлению, и все, что вы ожидаете от современной RTS игр
Игра поддерживает несколько вариантов игры: обучение, кампанию, сражение, мультиплеер и другие.

CPU-X программа для просмотра основной информации о компьютере (процессор, кэш, материнская плата, оперативная память, операционная система, графическая подсистема).

CPU-X по сути является аналогом CPU-Z для Windows, i-NEX и CPU-G для Linux и повторяет их графический интерфейс, но несколько выигрывает у последних, к примеру имеет русскоязычный интерфейс и активно обновляется.

CPU-X способна отобразить даже информацию об оперативной памяти, распаянной на материнской плате, чего не умеет даже CPU-Z для Windows.

GCompris is a large collection of educational games and exercises for children from 2 to 10 years old. Some of the exercises are presented in a playful way, but they are also educational.

GCompris currently contains over 100 exercises. Here is a list of activity categories with some examples:

This is a fully ready-to-use molecular visualization (molecular imaging) system for use in structural biology.
It allows to create high-quality three-dimensional images of both small molecules and biological macromolecules, primarily proteins.
About a quarter of all published images of protein structures in the scientific literature are made with PyMOL.

VisualFBEditor is an IDE for FreeBasic with a visual designer, debugger, project support, etc.
Allows the development of both console and graphical applications for different platforms Linux, Windows, Android.

gImageReader is a simple interface for tesseract-ocr. Tesseract is probably the most accurate open source optical character recognition (OCR) software available and can recognize text in over 60 languages.

It supports automatic detection of page layout, but the user can also manually define and configure recognition areas. You can import images from disk, scanning devices, clipboard and screenshots. Supports multi-page PDF documents. Recognized text is displayed directly next to the image, and basic text editing is possible, including search/replace and removing line breaks. Spell checking of output text is also supported if appropriate dictionaries are installed.

Interactive software for working with the board. OpenBoard gives you the opportunity to teach in different ways using current learning tools.
OpenBoard is intended for use primarily in schools, and can be used with both interactive whiteboards and touch or add-on screens.

Peculiarities:

Gobby is a collaborative editor that supports multiple documents in one session and multi-user chat. This means that it gives you the ability to edit files simultaneously with other users over the network.

Xournal++ - Create handwritten notes, sketches and journaling with a stylus. From solving a physics problem to keeping travel diaries. It can also be useful for adding annotations to PDF files.
Supports pressure-sensitive styluses and digital pens (e.g. from devices such as Wacom tablets, Huion tablets, XP Pen, etc.)
Possibilities:

Caliber is a library for cataloging e-books. Includes library management, eBook viewer and editor, and synchronization features for eBook reading.
Allows you to convert e-books to a dozen different formats and back.
Supports synchronization with almost all e-book reading devices (for example, Kindle, Kobo, Nook).
Can automatically pull news from a range of websites/RSS feeds, format the news into an e-book and download to a connected device.