Nima is described as 'Build, rig, and animate 2D characters optimized for game engines and applications'. There are six alternatives to Nima, not only websites but also apps for Windows, Mac and Linux. The best alternative is Synfig Studio, which is both free and Open Source. Other great sites and apps similar to Nima are enve (Free, Open Source), DragonBones (Free), Spine (Paid) and Spriter (Paid).
- 6 alternatives