General Homework

BJ Pinchbeck's Homework Helper
http://school.discovery.com/homeworkhelp/bjpinchbeck/

Schoolwork.org
http://www.schoolwork.org/

The High School Hub
http://www.highschoolace.com/ace/ace.cfm

Writing Research Papers

A+ Research & Writing Guide
http://www.ipl.org/div/aplus/

Citation Builder for Research Papers                                                          http://www.worldbookonline.com/pl/referencecenter/citation

Easybib
http://www.easybib.com
How to write a bibliography, MLA style, in a few easy steps.

Online Citation Styles
http://www.bedfordstmartins.com/online/citex.html
How to document almost anything.