Anima is described as 'With Anima 3.0 designers can create fully functional, responsive and interactive High-Fidelity prototypes, and it's all done inside Sketch'. There are four alternatives to Anima for a variety of platforms, including SaaS, Online / Web-based, Sketch, Figma and Mac. The best alternative is Zecoda. It's not free, so if you're looking for a free alternative, you could try Figma2Android or Sketch2Code.
Handoff gives designers and developers an extensive design tool that allows them to design and build UIs simultaneously. A tool that feels design, but breathes code. An all new way for both teams to jump in on the action, and create great digital products – together.