The European Association of Science Editors (EASE) is an international community of individuals and associations from diverse backgrounds, linguistic traditions and professional experience in science communication and editing.

Essay writing guide for students

This guide aims to help students succeed with college-level writing
assignments. It outlines how to brainstorm, draft, and revise papers, as well as covering common grammatical errors and offering a list of other valuable web resources.

http://www.onlineschools.org/online-writing-center