http://www.eduplace.com/kids/hmsv/smg/  This is a game where learners can improve their spelling based on matching activities. It has different levels and grades.

http://teacher.scholastic.com/activities/bll/index.htm  Scholastic provides three games to improve spelling skills. Leo Loves to Spell ( students help Leo find the correct letter ), Reggie Loves to Rhyme ( Rhineceros needs help finding the the words rhyming with different objects ), and the third one is called  Nina the Naming Newt  which  also needs help identifying objects that belong to various places.

http://dictionary.reference.com/  This site has 6 word games and some of them are spelling activities such as : Miss Spell's Class.

http://www.spellingcity.com/  This is a website for both spelling and vocabulary practice. It includes more than 42.000 spelling words and takes into consideration the spelling differences between the American and British English ( colour/color, favourite/favourite ). It also provides the correct pronunciation of every word mentioned there.

http://www.spinandspell.com/game.swf  A spelling and vocabulary-building exercise site. Images and audio are provided, and players select the categories they want to use. It doesn’t use the words in sentences.

http://www.learner.org/interactives/spelling/index.html This site from Annenberg Media, lets you pick your level of difficulty, provide audio support, and give the words in context, but the context is not just in a sentence — it tells you a story.

http://www.bbc.co.uk/schools/spellits/ad_menu_flash.shtml - A site from the BBC. It provides some direct instruction in spelling patterns — using audio and text — and has a number of games that provide the same level of support.

http://www.wordcentral.com/games/alpha-bot.html  A game where you first listen to the word spoken and then have to find the correct letters to spell it.