Linguistics

Purdue University Online Writing Lab (OWL)

Advantages:
- Very good support for HTML content. (Mendeley and Refworks are more PDF-centric.)
- Lets you take an unlimited number of notes on each item, create notes that aren’t attached to a specific item, and search and tag notes.
- Highlights and annotations on documents are synced across computers.
- Good support for group collaboration.

Disadvantages:
- No ability to search text in "sticky notes" in PDFs.

Advantages:
- Syncs your highlights and annotations across computers.
- Installed in campus computer labs.
- Some support for small group (up to 3 people) collaboration.

Disadvantages:
- Works best when you download the desktop program, although there is a Web interface.
- Weaker support than Zotero for searching, tagging, etc. your notes and annotations.