Poker Odds Calculators
There are free downloadable odds calculators for the following games:
NLHE
Omaha
Omaha Hi/Lo
7 Card Stud
7 Card Stud Hi/Lo

Very easy to use, just click or drag the cards into the board and hand slots and calculate.  You can do the odds for any street by recreating the situation at that time.

  http://www.turningriver.com/

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Hand Converter (straight text output for forum posting)
http://www.thehandconverter.com/
use the deucescracked forums option

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Hand Replayer (creates a Flash animation of the table and action in the hand)
http://www.pokerhandreplays.com/
use Forum BB Code and paste directly

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Universal Replayer
Excellent hand replayer. It's the one you see in a lot of poker strategy videos.

http://www.universal-replayer-net

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ICM Calculator
This gives the expected payout of each player at a table based on chip count and prize payouts:

http://www.icmpoker.com/Calculator.aspx

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Poker Stove
Can calculate hand odds of entire preselected hand ranges rather than just straight hand vs. hand odds

http://www.pokerstove.com/

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