BlueDict is a powerful dictionary which is fully compatible with MDict data format, the best one on Windows Mobile platform.
HTML, Images, Text-to-Speech, audio recordings, css are also supported.
BlueDict provides an interface for Google Search & ColorDict. E-books Reader like Moon+ Reader pro, ezpdf reader can use BlueDict as its inner searching Dictionary.
NOTES: Just like many other third-party apps, BlueDict is only a database "reader". So you need to get the databases then put them into /sdcard/BlueDict/Dicts or your specified path.