From Liquipedia StarCraft 2 Wiki
- Galaxy Map Editor - The official map editor
- Replay Websites - Allow analysis of matches and the state of the way the game is played.
- PDT Build Order Simulator Develop build order visually using drag & drop
- Scelight - The Successor of SC2Gears
- SCFusion - build order developer/optimizer (Last official update Feb 2016)
- SC2NetInfo - helps figure out whether drops/lags are caused due to SC2 using TCP over UDP
- StreamPrivacy - Allows streamers to hide selected windows from their stream.
- SC2 / XSplit Scene Switcher - Allows streamers to set automatic scene changes on XSplit triggered by SC2 events.
- SC2 Scrapbook - Shows build orders on your gameplay screen in StarCraft, for easy copying.
- SC2ReplayHandler - Automatically Rename/Copy/Move Replays based on Game Information. (Last updated in 2012)
- SCFusion to SC2 Scrapbook converter - Converts a generated SCFusion build to SC Scrapbook format.
Link to tool download is dead
- Snute's Click Game - Precision trainer and stress management in a simple package. It is downloadable but limited to 1920x1080.