FREE resources for proofreaders below...
Proofreaders and proofreading on Wikipedia.
Okay, not always the most reliable source of information and prone to more than a little online mischief-making, but in this case I think we can be reasonably confident of the content. I mean, who's going to mess around with the Wikipedia proofreading entry? Plus, it's a great jumping-off point for all kinds of useful information. Click here.
Second only to a red pen in the proofreader's toolbox is a comprehensive and reliable dictionary.
Drawing its entries from a number of online sources, Dictionary.com also has the added benefit of pronunciation audio files. Click here.
The 100 most commonly misspelled words in English.
Even the best of us can get caught out every now and then by these tricky little devils. Click here.
Some very common grammatical errors.
Now, look, I'm not suggesting for a second that you'd make mistakes like these. It's just that, well... Anyway. Click here and here.
The Plain English Campaign
A fantastic resource for all things relating to clarity of communication. Plus, they have a 'gobbledygook generator' which is great fun. Click here.