CanOpener 2.5 from Abbott Systems, as found on [Mac Treasure Box -
1996][1].

See also:
[CanOpener 3.5][2]
[CanOpener 4.0][3]

Compatibility
Architecture: 68k

  [1]: http://macintoshgarden.org/apps/mac-treasure-box-1996-apps-utilities-games
  [2]: http://macintoshgarden.org/apps/canopener-35
  [3]: http://macintoshgarden.org/apps/canopener-40