The ModCabinet wiki exists to provide a slightly-easier way of browsing through Borderlands 2/TPS mods, apart from digging through the somewhat-daunting main github repo. See the categorized listing by clicking on this link to get to the wiki itself!
The content of this wiki is auto-generated on a regular basis. Check the Wiki Status page for the most recent update time, and any errors which may have occurred during the wiki generation.
For information on actually building your own mods, the BLCMods Wiki is your best starting point.
To make sure that your github Borderlands mods show up in the ModCabinet, take a look at the Contributing to ModCabinet page.