Competition with CMUSphinx
There are many excellent recognizers available. This page helps you to choose between them and compare them with CMUSphinx decoders.
Julius
Large vocabulary multipass recognizer, GPL license, good for dictation.
HTK
Large and small vocabulary recognizer, model training, advanced HMM features, crappy code, restrictive license
Scout
Never tried it
RWTH-ASR
Never tried it