Startpages, social bookmarking, and other useful web2.0 apps
15 Essential Web Tools for Students

Bookmarking

delicious Use delicious to save and access bookmarks anytime/anywhere
diigo Similar to delicious but with many more functions such as creating/following groups
gl.am - Collect and annotate sites to share with others

Citation Creation (Making your bibliography)

Bibme

Collaboration & Notetaking

Google Docs
Zoho
ShareTabs - Find useful sites and then share them with your class or group.

Startpages/Homepages

Pageflakes
iGoogle
Netvibes

Digital Storytelling

Check with your teacher to see if they have a classroom account for any of these tools.
Toondo
Glogster
Animoto
Six easy ways for students to create videos online

Mind Maps & Graphic Organizers

bubbl.us
Graphic Organizers

Conversion Tools

Zamzar Convert images, documents, videos, presentations. If you create a document at home and it saves with a .docx you can convert to a doc at school by using Zamzar. Works for ppt. and pptx as well.

Tip: Open your document using Text Edit and then save to the format you need.