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.
Add a to 2-letter words
40 words found.

aah              ait              boa              
aal              ala              era              
aas              ama              eta              
aba              ami              goa              
abo              amu              moa              
aby              ana              oda              
ado              ane              ora              
aga              ape              pea              
ago              are              pia              
aha              ash              sha              
ahi              awa              uta              
aid              awe              yea              
ain              aye              
ais              baa

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!