And if you use Outlook as your email tool then you could download and use their Outlook add-in to check your emails for any errors in English.

Features:

• Correct grammatical errors in your English writing.
• Web based, easy to use and does not require registration.
• Search Bing from the page to find usage examples on the web.
• Outlook add-in available for Outlook users.
• Similar tools: AfterTheDeadline, Spellify, Orangoo, Spellist, WebSourceIt and SpellJax.

Check out ESLAssistant @ www.eslassistant.com (By Abhijeet from Jeet Blog)

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• Common Errors In English: Lists Commonly Misused English Words
• Apostrophe.me: Shows How To Use an Apostrophe
• AfterTheDeadline: Ouick Grammar Checking Site
• Phrases: Search for Idiom Phrases & Get Meanings
• YouSendIt Outlook: Send Emails with Large Attachments from Outlook

There is no download and no registration required. Doing a right-click on the underlined word shows you the suggestions to fix the text.

Features:

• Online grammar and spelling checker.
• Suggests styling as well.
• No registration or download required.
• Light-weight and easy to use interface.
• Similar sites: Spellify, Orangoo, Spellist, WebSourceIt and SpellJax.

Check out AfterTheDeadline @ www.polishmywriting.com (via DownloadSquad.com)

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• ESLAssistant: Correct Grammatical Errors In Your English
• Spellify: Automatic Spell Checking
• SpellCheck: Quick Spell Check Tool
• Common Errors In English: Lists Commonly Misused English Words
• Apostrophe.me: Shows How To Use an Apostrophe

Additionally you can also manipulate text into Upper, Lower or Proper Case.

Features:

• Spell check text or a single word online.
• Include up to 20,000 characters at once to check for spelling mistakes.
• Get spelling suggestions and apply them to your text.
• Manipulate text into Upper, Lower or Proper Case.
• Similar websites: Spellify, Orangoo, Spellist, WebSourceIt and SpellJax.

Check out SpellCheck @ www.spellcheck.net

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• Spellify: Automatic Spell Checking
• AfterTheDeadline: Ouick Grammar Checking Site
• YourFonts: Creating Fonts Online From You Own Handwriting
• YourDraft: Create and Share Drafts Online
• WriteBoard: A Collaborative Text Editor

It’s a simple website where either you could type in a line or paste multiple paragraphs in its extended version, and it would immediately provide suggestions for misspelled words. And it does spell check in multiple languages too.

Features

• Automatic online spell check.
• Paste or type text or multiple paragraphs.
• Immediate pop up of correct words/suggestions.
• Support for different languages.
• Download and use it on your website to spell check filled web forms.
• Similar tools: Orangoo, Spellist, WebSourceIt and SpellJax.

Check out Spellify @ www.spellify.com (by Abhijeet from Appscrazy)

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• SpellCheck: Quick Spell Check Tool
• AfterTheDeadline: Ouick Grammar Checking Site
• YourFonts: Creating Fonts Online From You Own Handwriting
• YourDraft: Create and Share Drafts Online
• WriteBoard: A Collaborative Text Editor

When it come to the site spell check, it’s free only for sites with less than 60 pages. If it is greater than 60 pages only partial spelling report is provided. The report is delivered via email within 24 hours.

Features:

• Text and site spell check.
• Get full spell check of your site if it is not greater than 60 pages.
• The sites grater then 60 pages will only receive partial report.
• Supports 27 languages, including English, German, French, Spanish, Italian, and many more.
• Powered by Google, Aspell, and TextTrust.
• Displays multiple corrections for a wrong spelling.
• Similar websites: Spellist,  WebSourceIt and SpellJax.

Check out Orangoo @ http://orangoo.com/spell/

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• WebSourceIt : Which of The Two Spellings is Right?
• SpellJax : Online Spell Checker
• Spellist: Easily Spell Check A Web Page
• Spellify: Automatic Spell Checking
• SpellCheck: Quick Spell Check Tool

As you can see, when I spell checked MakeUseOf, it found some errors, which in fact are not spelling mistakes, instead they are the words which it couldn’t find in its dictionary including the names of the MakeUseOf authors

Overall, it’s a nice and handy tool to perform a one time spell check on your website and make sure all the spellings are in order.

Check out Spellist @ www.spellist.com ( Contributed by Abhijeet from Jeet Blog )

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• YourDraft: Create and Share Drafts Online
• Yahoo! Media Player: Embedable MP3 Player
• WireNode : Create your Own Mobile Startpages
• WidgetEasy : Add External RSS Feeds to your Blog
• WebSourceIt : Which of The Two Spellings is Right?

Similarly, it can be used to choose between the right homophones (or homonyms). Homophones are words that sound the same but are spelled and defined differently. For instance, using WebSourceIt you can check whether it’s more then or more than.

How does it work?

(1) Enter your words or phrases in to the provided fields and click “Enter”.
(2) WebSourceIt will then count the number of times the terms appear on the web.
(3) The higher the number, the higher chances of it being correct.

Features

• Max phrase length: up to 5 words.
• No sign up or registration needed.

Check out WebSourceIt @ www.websource.it

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• WriteRhymes : Find Word Rhymes
• IdiomSite: Find Out Meanings of Common Sayings
• Writer : Distraction-free Internet Typewriter
• Woxikon: Online Dictionary And Translation
• WordSift: Visualize Text & Related Information

Check out SpellJax @ (www.spelljax.com)

• New: Follow MakeUseOf on Twitter. Recommended!
• MakeUseOf 'Geeky Fun' - Hillarious Geeky Pics and Videos from different parts of web.

• WebSourceIt : Which of The Two Spellings is Right?
• WriteRhymes : Find Word Rhymes
• Writer : Distraction-free Internet Typewriter
• WriteBoard: A Collaborative Text Editor
• Write or Die: Get Back To Writing!