Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Free Ones
furax-poker
PokerTracker
poker-spirit
pokerHUD
PokerNow-HUD
poker_hud
https://github.com/dclong/felt
https://github.com/dclong/donkhud
osPokerHUD
pokernow_hud
PokerMuck
https://github.com/dclong/poker-1 A poker hand equity calculator, PokerStars and Full Tilt hand parser and history browser, and table HUD for Hold'em, Omaha, Draw, Stud and Badugi, written using Java 1.7 and Swing.
https://github.com/dclong/easyPokerHUD easyPokerHUD is a free and open-source poker HUD for PokerStars and 888 Poker. It is build with C# and SQLite. The code is released under the GPLv3-license.
poker-hud
poker-hud is a simple HUD for Winamax Poker software. The app create a database which store all hands available in the selected hand history folder. When a file changes inside the hand history directory, the app parses it, computes some statistics and displays a widget per player around the table.
https://www.hand2note.com/Purchase has a free (but limited) version.
Commerical Software
https://www.hand2note.com
References
https://hand2note.com/Help/pages/FreePokerHUD/