There are a large number of writing sites, many of them compiled by universities anxious to give their foreign students help with academic English. Much of this advice is geared to undergraduates, but there is still some useful advice. We have selected the best of them, together with other relevant sites, and the details are below. If you know of any others which you have found particularly useful, please do not hesitate to contact us.
Online Writing Lab (OWL) One of the first Internet writing resources, this site is the work of Purdue University Online Writing Lab, and contains some very high quality handouts on a range of subjects from placement of the comma to writing research papers and non-sexist language.
This site takes well-known reference books on English usage, such as Fowler, American Heritage Book of English Usage, and provides a search facility. Quite why they use the 1908 version of Fowler is a mystery, and their pop-up ads are irritating, but other than that they provide a very useful site.
A useful reference work where you can check usage/spelling.