I created Alfred workflow for my http://prettydev.com.
It allows to quickly make common developer commands: calculate md5, sha1/..., base64, urldecode text, encrypt and decrypt data, convert timestamp to date and decimal integers to binary.
For example: dev uuid4 will generate new uuid4 string.
http://prettydev.com/data/Prettydev.alfredworkflow
If any bugs — write please, they will be fixed