Cappeller's Digital Sanskrit-English Dictionary - At present the digital version of Cappeller's Sanskrit Dictionary (1891) contains approx. 50.000 main entries. The transliteration is based on the Harvard-Kyoto (HK) convention
Cologne Digital Sanskrit Lexicon - At present the Cologne Digital Sanskrit Lexicon contains Monier-Williams' 'Sanskrit-English Dictionary' with approx. 160.000 main entries. The transliteration is based on the Harvard-Kyoto (HK) convention.
Online Sanskrit Dictionary - "This is an attempt to build up a repository of Sanskrit words and meanings in a simple, easy-to-extend format."