A small update to my base64dump.py program: with option -n, you can specify the minimum length of the decoded base64 stream.
I use this when I have too many short strings detected as base64.
base64dump_V0_0_2.zip (https)
MD5: EE032FAB256D44B2907EAA716AD812C5
SHA256: 1E5801DD71C0FFA9CA90D2803B46275662E222D874E409FF31F83B21E6DEC080