Best On-line Collaboration Tool

Google Docs

Runner-up: Wikis

We didn't title this Most Popular Collaboration Tool, because as painful as it is, the majority of on-line collaboration tends to be e-mail messages with subjects like "RE:Fwd:Fwd:Re: This one Re: Final FWD: Final2" and ugly multi-fonted .doc files. Although popular, that's definitely not ideal. Google Docs takes the spoils of war again this year with its ever-improving feature set for on-line collaboration. It's even possible to watch as someone else edits a document. For everything else, wikis are still popular. Easy to edit and easy to maintain, wikis are a godsend for living documents.