Here are a few scripts I've written to solve various problems.
svnask.pl Add and remove files from a Subversion checkout interactively from the command line. Much nicer than coyping and pasting file paths from the output of svn status.
From Smartening Subversion with Perl
svnstatus.pl Report on the state of all the Subversion checkouts scattered around your system, to help you keep track of what has and hasn't been checked in yet.
From Smartening Subversion with Perl
launch.pl A command-line application launcher for OS X.
From A Spotlight Alternative With Perl
RentedMovieCalendar.sh Export your Netflix rental history to iCal.
From Rented Movies Calendar
svncalendar.sh Display a Subversion repository's commit log as a calendar.
From Put Your Subversion Commit Log On A Calendar
swftemplater.applescript Drag-and-drop creation of templated HTML files for SWF movies.
From AppleScripting HTML for SWFs