UPS worldship alternatives

I am looking for shipping software that is Terminal Server or Citrix compatible.

What are you guys using, i have looked online and seen nothing that impresses me / is compatible,

Really looking for software that is compatible with USPS, Fedex and UPS to ship and create labels.

UPS world ship works fine on a single PC, however it is not stable unless ran with Admin privileges. We are phasing out as many PC's as possible so if someone has good alternative software to recommend it would help immensely.