QMentat helps you practice mental arithmetic. It uses arbitrary-length fixed point arithmetic, and can handle any size numbers, only limited by the size of your screen (and in the case of division with an integer result, the speed at which the number can be factored). It is also quite configurable, allowing you to tailor the questions to your needs.
Government Sanctioned is a custom-developed text-based RPG (i.e., MUD). New players enter the world of Government Sanctioned as covert agents working for a super-secretive government organization colloquially known as "the agency". Players have a choice of six different roles spanning 19 unique professions. Whether you like stealthy, clandestine operations, the use of subterfuge and guile to infiltrate enemy organizations, or full-blown military actions, the agency has a spot for you. Players are empowered to deeply customize their character through numerous differentiation mechanisms. Character backgrounds lay the foundation for character abilities and are further defined through their cover occupation and agency department affiliation. To put a fine point on character customization, the skill and feat system provides an extensive array of options to tweak the character to suit your style of game play. The skill system boasts over 35 different skill families with around 50 different skills and checks. Skill points are gained upon professional level advancement and can be spent any way the player chooses. With 19 feat trees and over a hundred diverse feats (with new feats being added regularly), your capability for customization is endless.
Arx Libertatis is a cross-platform, open source port of Arx Fatalis, a 2002 first-person role-playing game developed by Arkane Studios. Arx Fatalis features crafting, melee and ranged combat, and a unique casting system where the player draws runes in real time to effect the desired spell. The Arx Libertatis source code is based on the publicly released Arx Fatalis sources. This does however not include the game data, so you need to obtain a copy of the original Arx Fatalis or its demo.
QSapecNG (Symbolic Analysis Program for Electric Circuits (New Generation)) is a Qt-based program for symbolic analysis of linear analog circuits. It consists of two independent parts, the SapecNG framework engine and the QSapecNG GUI. It was based on SapWin. Users can draw, solve, analyse, and manage analog circuits.