version-upgrade-diff.sh upgrades Drupal by applying a patch created from two fresh copies of core.
ts.sh downloads a copy of Drupal for use as a test site and runs drush site-install.
newdb.sh and deldb.sh creates a database (with user and pass the same as the database name) and deletes a database, respectively.
agc.sh does a git clone from the Agaric site project repository.
Note: Moved here from Gitorious now that Drupal is on Git, these aren't a module so they are abusing the "Drupal.org projects" project type, whatever that is.