You can also try these related scripts:
- Bundle Helper - Add tools for many bundle sites.
- Bundle Helper - Highlights games you already own on Steam, on other sites. Modified from https://greasyfork.org/scripts/16105-bundle-helper/
- Indie Gala Show Key - Show your keys instantly
- The Redeemer - Pops up the Steam product activation dialog when copying keys from bundle/reseller sites. Supports various bundle organizers and legitimate key resellers.
- IndieGala trades steam links - Adds links to the steam store page for IG trade pages