I've tried to compile a complete list of the various indie bundle sites, feel free to add any I might have forgotten:

- The Humble Indie Bundle (http://humblebundle.com/) - The one that started it all...
- The Indie Royale Bundle (http://indieroyale.com/) - hosted by Desura
- The Indie Gala Bundle (http://indiegala.com/)
- The Indie Bundle (http://theindiebundle.com/)
- The 5 for $5 Bundle (http://buygamesnotsocks.com/)
- The Indie-Games Pack (http://indiegamespack.com/)
- The Little-Big Bunch (http://getgamesgo.com/little-big-bunch)
- The AGS Bake Sale Bundle (http://agsbakesale.com/)
- The Intermediaware Bundle (http://intermediaware.com/bundle)
- The various Steam indie bundles that appears at sales (http://store.steampowered.com/search/?snr=1_4_4__12&term=bundle&genre=indie)
- The 99% Bundle (http://99bundle.com/)
- The Bundle of Wrong (http://bagfullofwrong.co.uk/bagfullofwords/whats-in-bundle-of-wrong/)
- The Pirate Kart (http://piratekart.com/)
- The IGF Pirate Kart (http://piratekart.com/igfpiratekart.html)
- The Majicjungle Bundle (http://majicjungle.com/5gamesin1/)
- The Corona Indie Bundle (http://coronaindiebundle.com/)
- The GameDev Bundle (http://gamedevbundle.com/)
- The Indie Music Bundle (http://gamemusicbundle.com/)

I posted it on my G+ account as well:
https://plus.google.com/u/0/111577425195870045549/posts/7dctHCeJCw8

Thanks for the list. I wonder if any of the other bundles are worth it? Seems a few are a bit on pricey side tho.