What's the best/easiest way to import idle animations into blender?

[Omnishade]

I know how to animate in blender and it's the only 3D program I can work with at the moment. I googled a bit but didn't find any satisfying results on this. Either the method is outdated or involves a lot of complex steps with cmd commands etc. So what do you need to do to achieve this and are there any workarounds or good tools out there?