Script extensions allow you to create your own custom checkpoints and scripting objects. Here are 7 of the extensions I've written so far. Feel free to download them, tweak them, collect them or trade them with your friends. :)

Extension	Description
Credit Card Checkpoint	Verifies credit card numbers are in the correct format (note: it does not determine if a credit card number is valid)
Registry Checkpoint	Verifies a value in the registry
Run Command	Runs a program without needing to add the program to the TestedApps node
SSN Checkpoint	Verifies social security numbers are in the correct format. (note: it does not determine if a SSN is valid)
Validate Directory Contents	Stores a list of files in a directory, and then compares that list to the files in the directory at runtime.
Wait for Object	Allows users to select an object on screen, and specify an amount of time TestComplete should wait for that object to be displayed.
Zip Code Checkpoint	Verifies zip codes are in the correct format.

To install these, just download and copy them to your TestComplete install directory and restart TestComplete:


c:Automated QATestComplete 6BinExtensionsScriptExtensions

You'll find the new commands on the toolbars next to the built-in checkpoints.