I fell into the Borderlands 2/TPS modding community in early 2018 and have yet to extricate myself. I've got a number of BL2/TPS-modding-related things hosted here, so here's the list:
- General Modding Info for Borderlands 2 / TPS on Linux.
- A BehaviorProviderDefinition and Kismet Sequence Grapher, to aid in modding those slightly-more-complex-than-usual objects in the game.
- BPD Number Calculator, again for use in editing BehaviorProviderDefinitions.