scim is described as 'The Smart Common Input Method (SCIM) platform project provides not only a user friendly, full featured input method user interface for POSIX-style operating systems (including Linux, FreeBSD and other Unix), but also a development platform to make input method development easier' and is an app. There are three alternatives to scim for Linux, BSD and Mac. The best scim alternative is UIM, which is both free and Open Source. Other great apps like scim are iBus and fcitx.
Uim is a multilingual input method library, whose goal is to be a flexible development platform and useful user environment for input methods of all languages.
UIM is the most popular Mac & Linux alternative to scim.
UIM is the most popular Open Source & free alternative to scim.
Intelligent Input Bus. Input Method for many languages especially CJK (Chinese, Japanese, Korean) but not only.
Fcitx ['fa?t?ks] is a input method framework with extension support. Currently it supports linux and Unix system, like freebsd. It has three builtin Input Method Engine, Pinyin, QuWei and Table-based input methods.
