Rich Action Editor

Sprite frames + motion keyframes
← back
100%
drag the sprite to set position at this time (creates a motion keyframe) · drag corner/edge handles to scale, rotate · alt+drag edges to skew · click a marker on the timeline to seek · ctrl/⌘+wheel to zoom

Source sprites

(no atlas needed)
click a sprite → adds to active track · shift-click → select range from last-clicked · ctrl/⌘-click → toggle individual into multi-selection · hover to enlarge