The Writing Center: university-wide writing consulation center.
USC Library Quicksearch: (for wireless and off-campus requires proxy login first.)
Voice of the Shuttle: Extensive database of academic resources (UCSB)
Academic Blog Portal: Wiki of blogs with academic goals (UIUC) http://www.academicblogs.org/wiki/index.php/Main_Page
MLA Guide (Writing Center)
APA Guide (Writing Center)
OWL, Online Writing Lab (Purdue)
Index of online Grammar Resources (Chicago)
The Topoi Page: A collection of widgets to help you use the topoi.
Thesis Tips: Heuristics for thesis-building (UIUC)
Thesis Builder: Tool for brainstorming thesis formulation.
Grammar and Style
Guide to Grammar and Style (Lynch, Rutgers)
Guide to Grammar and Writing, (CCCF)
22 Short Films about Grammar
Grammar Girl's Tips
Online Books and Text Companion Sites
The Elements of Style by Strunk and White
Rules for Writers by Hacker: includes exercises for heuristics, drafting, style, and mechanics.
The Forest of Rhetoric by Burton (BYU) Featuring Rhetorical Figures
RefWorks: USC subscription-based tool for online research
Zotero: Browser extension for online research
Diigo: Browser extension for annotating web pages and social bookmarking
Del.icio.us: Browser extension for social bookmarking