http://grammar.ccc.commnet.edu/grammar/
- guide to grammar and writing
http://www.grammarbook.com/homonyms/confusing-words-1.asp
- Spelling, Vocabulary, and Confusing Words
http://www.junketstudies.com/rulesofw/
- 11 Rules of Writing
http://classiclit.about.com/od/forstudents/ht/aa_criticalread.htm
- Steps to become a critical reader
http://www.classicreader.com/
- Free Classic Books Online
http://www.dustball.com/cs/plagiarism.checker/
- Plagiarism checker