ExpiredDomains dot NET by Marco Schmidt provides lists for hundreds of extensions as well as lists for deleted names and auctions as well, such as Godaddy. It's an incredible resource. It's free to join, and I'm happy to highly recommend it. They seem to make their income if you make bids via their links, which I'm very careful to do.
It may not cover every single extension, which would probably be because they might be difficult or impossible to obtain. Marco is extremely thorough and seems to cover everything possible.
The site says it covers 388 tlds as well as 294 new gtlds. Probably all the important ones.