An inexpensive and very, very good solitaire card game for computers, with 23 different kinds of solitaire. The front of the box is graced with a weasel, and
the "Eric" in question is Eric Snider. The title of the game is a bit of a family tradition. Eric's older brother David Snider also used his first name in his first game title: he wrote games for the Apple II, including the extremely popular David's Midnight Magic.
Eric's Ultimate Solitaire was first published for Macintosh, but was ported to Windows. Loki Games even puts out a Linux version.