Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
Minecraft - A block-building game that allows you to create and explore entire worlds from scratch.
Hours - Boosting productivity through live, virtual co-working.
Minetest - Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner...
Futuramo Time Tracker - Futuramo Time Tracker is a time tracking solutions designed for freelancers and teams.
Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.