The notetaking member in Microsoft's suite is a cross-platform productivity application. There are many unique ways to use OneNote, and using it to change the way you teach or study could be the best one. Come aboard. OneNote has loads of tips for the teacher and the student. And before you forget - OneNote is free!
Zotero [zoh-TAIR-oh] is a free, easy-to-use Firefox extension to help you collect, manage, and cite your research sources. It lives right where you do your work - in the web browser itself.