Hello i bought a sds100 what is a good program to use for sds100?
You have to have Sentinel installed to maintain the master database, as well as to apply any (hopefully, future) firmware updates.
Past that, as
jt has already suggested, my preference is
ProScan. For the cost of the license ($50), you get lifetime updates to the program. Besides programming, you also get logging & recording, plus the program handles multiple Uniden scanner models, not just the SDS and BCDx36HP series. ARC536 is also available, but it only works for the SDS & x36HP scanners. It's "basic" version is $39.95, is only for programming. If you want logging & other features not in the Basic version, you have to purchase the Pro version, $69.95, which is about 20 bucks more than ProScan.