Download Update (2,9 Mb) - to version 3.3 (377): http://web.archive.org/web/20060221065128/http://download.microsoft.com/...
Download from Microsoft site (no longer requires registration):
Vector based graphics application from Creature House (MetaCreations Group).
UI very similar to MetaCreations Painter.
Now acquired by Microsoft, and released as freeware.
More at Wiki: http://en.wikipedia.org/wiki/Creature_House_ExpressionCompatibility
PPC, Mac OS 8.6 or above.