Use MetaPDF to edit PDF metadata, so your PDF's are displayed with the correct title, subject and date. Also, you can assign keywords to your documents to group them in a context and to find relevant texts easier.
- Edit metadata like title, topic and author
- Change file information like creation and modification date
- Unlock encrypted PDFs (if you know the password)
- Permanently remove password protection from PDFs
- Batch edit multiple files
- Add keywords
- OS X 10.7 or later