Scool Scrabble Tool
Scool is a tool for finding valid letter combinations for Scrabble. It currently uses the TWL06 wordlist. We'll add other wordlists in the future to complement TWL, such as SOWPODS.
You would benefit by memorizing these:

 

Construct your own queries:

Like:

Use the following placeholders for the like query: % matches any number of characters; _ matches exactly one character, !negates; @ intersects (AND's) the results. The like query is a fast and flexible way to find words matching a pattern.

 

Anagram:

Sub-anagrams are coming... stay tuned!

 

Where:

The where query is more advanced. It lets you define the SQL WHERE clause manually. For example, here's a query that finds all 7-letter words with 'able' somewhere inside them.
q with no qu
42 words found.

qi               tranq            qabalah          
qat              umiaq            qabalas          
qis              buqsha           qindars          
suq              burqas           qintars          
qadi             faqirs           qiviuts          
qaid             qabala           qwertys          
qats             qanats           sheqels          
qoph             qindar           mbaqanga         
suqs             qintar           qabalahs         
burqa            qiviut           qindarka         
faqir            qwerty           sheqalim         
qadis            sheqel           mbaqangas        
qaids            tranqs           
qanat            umiaqs           
qophs            buqshas

Scool is intended to make you better at Scrabble, by giving you an interactive way to learn new valid letter combinations. It is about learning, not cheating. Perhaps it would make a good handicapper: you play without it and your 12-year-old plays with it, for example.

More tools to come. Suggestions to p@ulmcnett.com. Thanks to Rebecca Slivka over at the Seattle Scrabble Club for some great ideas!