The following is a partial list of tools that I maintain and use:

• GEM to PurpleFox Tampermonkey script - cross-browser way to export results from GEM to clipboard, for PurpleFox importing
• Melee Tampermonkey scripts - cross-browser scripts to allow for things like auto-refresh of results/registration information, showing the tournament name in more places, and exporting to PurpleFox
• OBS Round Timer - fork of an OBS Lua script for a timer, customized for TCG events