UC Davis Student Writing
UC Davis Writing Resources
Shields Library Citation Style Guides and Support (help with styles such as APA, Chicago, CSE, etc.)
Open-Source Writing Resources
Purdue Online Writing Lab: Purdue OWL is a handbook about writing covering things like grammar as well as how to craft a thesis.
UNC Writing Center Handouts: The UNC, Chapel Hill Writing Center provides handouts related to a variety of writing topics (e.g., paragraphing, thesis statements, etc.)