UBCWiki is UBC' mediawiki platform, the same technology behind Wikipedia. It is public and editable by anyone with a CWL. Google docs and Wiggio can be password protected and shared with only the people in your group. Wiggio has many features to support groupwork.
Student Toolkit: Wikis
Store your bookmarks online in a searchable personal archive that allows you to retrieve your resources from any computer with an Internet connection. Diigo also allows you to annotate and highlight webpages. Adding a new link can be done with as little as two clicks of the mouse. And the best part (social) means that you can share your bookmarks with others and vice versa!