免費的一些在線密碼破解站點，不僅僅侷限於MD5，很多都是國外的站，需要使用VPN或者代理訪問。
MD5
MD5Decrypter(uk)
Plain-Text
Crackfoo -NNC
Hashcrack
Gdata
MD5this
MD5crack
Noisette
Joomlaaa
Igrkio
MD5decrypter
Shell-Storm
NetMD5crack
XMD5
TheKaine
InsidePro
MD5pass
Generuj
AuthSecu
MD5decryption
Schwett
Crackfor.me
MD5-db
Drasen
Gromweb
MD5hood
MD5.my-addr
MD5online
Macrosoftware
Bokehman
MD5-decrypter
Thoran
C0llision
Rednoize
web-security-services
MD5-lookup
CMD5
Tmto
Shalla
Hash-Database
Bokehman
Benramsey
Digitalsun
Kalkulators
StringFunction
Toolz
Fox21
Gat3way
Sans
Appspot
HashCracking.ru
Anqel
Offensive-Security
Altervista
Xanadrel
Beeeer
Kinginfet
AskCheck
hash-cracker.com
agilobable.pl
MD5finder
Wordd
MD5Rainbow
(IRC Bots)
Overclock
NTLM
MD5decrypter(uk)
Plain-Text
NiceNameCrew
HashCrack
Tmto
Fox21
LMCrack
hash-cracker.com
LM
Plain-Text
NiceNameCrew
HashCrack
C0llision
Tmto
Fox21
LMCrack
Offensive-Security
SHA1
MD5Decrypter(uk)
Rednoize
Web-Security-Services
SHA1-Lookup
CMD5
Tmto
Hash-Database
Toolz
Sans
HashCracking.ru
AskCheck
http://www.stringfunction.com/sha1-decrypter.html
hash-cracker.com
SHA 256-512
Shalla
Hash-Database
AskCheck
MySQL
HashCrack
CMD5
HashCracking.ru
WPA-PSK (free)
MD5Decrypter(uk)
WPA2Crack.com
(costs $$$)
WPACracker
Question-Defense