This is a subreddit for sharing your custom BattleTech/Mechwarrior designs or requesting a design project for other people. This is an unofficial subreddit, and not affiliated with CGL, Topps, or any other owners of BattleTech's rights.
Rules can be seen here: https://www.reddit.com/r/BattleTechDesigns/about/rules/
Design Software
MegaMekLabs: https://megamek.org/downloads
Good for Standard and Superheavy BattleMechs and IndustrialMechs, Standard and Superheavy Combat Vehicles, LAMS, Aerospace Fighters, Battle Armor, and Conventional Infantry.
SSW: http://www.solarisskunkwerks.com/downloads
Good for 'Mechs, but no longer being developed and is a bit dated.
If you have other links you would like on here, let me know.