We just updated our free Khmer to English dictionary to include more than 36,000 words and phrases to help you as you translate and learn Khmer and English! We switched platforms to the GoldenDict program since it allows us to import the data from our online dictionary resources at crowdin.net The program is portable for Windows (other platforms coming soon) so just download the file and unzip it and start using! If you have any issues or find errors please let us know in the comments (or you can login to crowdin.net and make the change yourself!).
There is a new release of our offline Lexique Pro dictionary that is available for download (Updated 8/13/10 27,693 words and phrases). The SBBIC dictionary now includes the KhmerOS glossary – Special thanks to a the Open Forum of Cambodia and NiDA for allowing us to import the glossary. This offline dictionary was compiled from the SBBIC Khmer Collaborative Online Dictionary at http://dictionary.sbbic.org Please visit the online dictionary and contribute new terms and or correct any errors so that they can be included in future releases of the dictionary. Download: SBBIC Self-installing English and Khmer Unicode Dictionary version .06
Download the Chuon Nath Dictionary for Khmer for PC in unicode. This is a great resource, and is official. It works with both 32-bit and 64-bit Windows based systems and is Java based so should be multi-platform (Windows and Linux, but supposedly not with Mac yet). Download it here: