If you're looking for a modern server-side replacement for Hammock, you can try:
http://github.com/danielcrenna/hammock2
If you need legacy support and System.Web namespace usage, then you'll want:
http://github.com/restsharp/restsharp
I'm really glad if this project was/is helpful for your development.
But I wouldn't count on any updates.
Patches that can merge cleanly are always welcome.
For everything else, there's a fork button.