Unified List Manager (ULM) is a feature rich Windows utility which excels dealing with word lists. While ULM may not be 'fast', it has a very user friendly interface and gets the job done. Some examples include list; sorting, splitting, joining, analysis, generating, slicing, hashing, converting and reformatting to name a few.
A big thanks goes out to the testers for making this release possible.
http://unifiedlm.com/Download