Video Poker
Offers a few dozen video poker games. Free download trial.
http://www.softgame.net/video-poker.htm

AcePoker
Triple Play video poker game for a pocket PC.
http://www.acebartender.com/AcePoker/

BVS Video Poker
Dozens of variations of video poker to play as a game or a teaching tool.
http://www.bvspoker.com/

WinPoker
Uses math to teach you the correct play for various video poker games.
http://www.zamzone.com/

Video Poker Wizard
Training and practice software for novice and advanced players.
http://www.videopokerwizard.com/

Poker
Freeware available to play online or by download on a Mac or PC.
http://poker.webware.ee/

MacTelligence - VideoPoker for OS X
Shareware game loosely following video poker rules (you can draw 5 cards, Jacks or better required to win).
http://www.mactelligence.com/software/VideoPoker.html

Brads Crap Software - PokieJoX
Emulation game for Mac OSX.
http://members.ozemail.com.au/~bradleys/

Video-Poker Tutor
Jacks or Better video poker with hints on what cards to hold, plus a Gin Rummy variation.
http://download-texas-holdem-poker.com/videopoker/videopoker.html