batch-rename (hackage): Do you remember the convenient command ren in MSDOS? When you want to change all your .mp3 files to .mp4. Simply type "ren *.mp3 *.mp4.". I really like this. But in linux/Mac world, people keep asking how.(http://bit.ly/2cIskUu) So maybe this little tool can help you a lot.
Keywords: program|public-domain|system