For general rigs this is a good place to start: Robot Arms IK I haven’t built general IK myself so I don’t have experience with it. I’ve never used that tool you mentioned, but if I had to recommend IK assets I would recommend those from Root Motion; Final IK and Puppet Master. I have both of these and they are fantastic. I’m actually using them with a character for a fighting game. Final IK is great for all sorts of IK purposes, and puppet master is great for things like playing animations and getting “live ragdolls”. So in a fighting game where you want realistic impacts while playing animations.
