Nexus Mods is an independent hosting service for video game mods. I had a brief foray into the modding scene in 2011 with The Elder Scrolls IV: Oblivion, and the resulting projects were published on the site (known as Oblivion Nexus at the time).
Mods for Oblivion could be created using the free 'Construction Set' developer tool to interact with the game data and assets. Despite making relatively few waves with my modest creations, this in-depth technical knowledge helped my work on the UESP Wiki immensely, and also enabled me to work with the developer tool for Oblivion's predecessor, TES III: Morrowind.
My published mods can be downloaded here.