- sc2mapster's getting started page is quite good for getting started. The home page includes links to many of the biggest sc2 modding discords
- Talv from sc2mapster made a sc2layout guide
- Talv's Galaxy reference
- Talv's Data reference seems less complete but at least lists all catalog types and their members
- The google doc on sc2layouts that everyone links
- sc2mapster extract of gamedata
- Old blizzard docs on using the editor
- editor debug cheats
- Old sc2mapster wikia site has a lot of information on editor data
- The sc2mapster wiki guide to text tags
- sc2 voicelines
- sc1 voicelines
- starcraft2coop.com has a bunch of co-op information and seems to be the easiest lookup of co-op upgrades
- Liquipedia has a bunch of historical stats and data
- Xiaorobear made a infographic showing canonical unit sizes:
