If you need to rig human-like characters for animation: there is a new version of Reallusions nifty tool accuRIG available. That helps you with rigging. You only need to add a few joint pints and the software does the rest. They rite on their website for the tool:
AccuRIG is a free application designed for fast and easy character rigging, aiming to reduce production effort for character artists by focusing on model design with automation and simplicity. Achieve accurate and superior rigging results in 5 simple steps for models in A/T/scan poses, or with low/high/multiple meshes. Direct export to all major 3D tools, or upload directly to ActorCore and try tons of production-ready animations for game, film, archviz, digital twins and more.
This can be really helpful if you have an unrigged humanoid character that you need to need a skeleton to fast. There is also a multitude of tutorials: