DekuTree64 has updated his art program Animanatee.

Changes:

NEW in v1.5
– Onion skinning can now be turned on for previous frame, next frame, or both.
– Onion skinning works while zoomed in.
– Added halftone brushes.
– Added 16x zoom level.
– Added Merge Layers button, to combine both layers into one.
– Added page buttons to save/load menu, so you can now use up to 100 slots.
– Added Up/X tool selection. You can now switch between Fill, Eraser, and Dropper.

Changes for 1.5a
– Fixed palette window bug

http://forum.gbadev.org/viewtopic.php?t=14116