GIFGIF.io is a handy online GIF editor with multitrack editing support.
What you can do with GIFGIF.io Editor: import videos from YouTube, Vine and Coub; cut, crop, add subtitles; combine videos, images and GIFs; change speed (slower/faster) and direction (normal/reverse); rearrange imported clips (move them up and down as you move tracks in video editor); and copy tracks.
Full features list:
- Import videos from YouTube, Vine or Coub (more supported video sites are coming)
- Cut and crop
- Add timed captions
- Import JPG/PNG images or animated GIFs
- Change speed
- Change direction (normal, reverse, ping pong)
- Combine videos, images and GIFs
- Multitrack editing
- Rearrange and copy imported clips
- No watermarks on your GIFs