Sprite Master

Sprite Master, or The Sprite Master, is a paint program for DOS. It was developed by Frederick P. Sexton Jr.

It has an .SPR image format, and an .ARY palette format. The formats may be used as a pair, or separately.

Identification
There doesn't appear to be any good way to identify the files from their contents.

Sample files

 * → *.SPR, *.ARY