Tor Browser
Tor Browser is a free and open source, multi-platform browser that provides privacy and anonymity on the network
GSmartControl
GSmartControl is a free and open source, multi-platform tool for checking the health of a hard disk and SSD
Anki
Anki – free and open source, multi-platform software to ease the remembering of data by means of flash cards and interval repetitions
TIPP10
TIPP10 is a free and open source touch typing tutor
KTouch
KTouch is a free and open source typewriter trainer for learning to touch type
Klavaro
Klavaro is a free and open source, multi-platform program designed to teach typing on the keyboard
Dungeon Crawl Stone Soup
Dungeon Crawl Stone Soup is a free and open source game in the Roguelike genre, an adventure through dungeons filled with dangerous monsters in search of the mysteriously fabulous Orb of Zot
KGeography
KGeography is a free and open source program for learning geography (map, information about regions), and you can also test your knowledge
Marble
Marble – free and open source, cross platform software that represents a virtual globe and an atlas of the world
Google Earth
Google Earth – free and crossplatform a virtual globe that provides geographical and cartographic information