Years ago I compiled a database of Windows DLLs, the function names they export, and their API Hashs using several popular shellcode API hashing routines.
I stumbled across it the other day and decided to add a file API hash scanner and hash lookup form to the gui_launcher of scdbg.
The first time you use the feature, it will prompt you and can download the access database. The hash table is currently about 30k entries.