[Pibwl]

I've heard only about Excalibur.
I'm sure you know it, but Wikipedia says, that self-propelled guns compatible with the Excalibur projectile are the American M109A6 Paladin and M109A7, British AS-90, German PzH 2000, South African G6, Swedish Archer and French Caesar. Towed guns compatible with the Excalibur projectile are the American M198 and M777 howitzers. Also Ukrainians used Excalibur with Krab.

Current operators: Australia, Canada, Jordan, India, Netherlands, Spain, Sweden, Ukraine (M777 and Krab and possibly others), and of course USA. Future or pending operators: Norway, Germany, Denmark.