there is another freeware app but it hasn't been updated for a long time. the slvr (i have that phone, too) is not supported.
so i think salling clicker is the only solution. but the money is worth it! i use it when i sit on my couch to do anything (control frontrow, itunes, dvd, keynote, any app that uses applescript or even control the mouse). you can do everything you want with your phone.