SCIM is a high level library, similar to XIM or IIIMF; however, SCIM claims to be simpler than either of those IM platforms.
Qt and KDE rely on the standard X Input Method (XIM) framework, and do not implement their own solutions.
It is headquartered in San Francisco and has 5 offshore development centers in Moscow, Obninsk, Ulyanovsk, Minsk and Gomel.