Open Utlity is series of unix utlity just like gnu for linux / windows
Open Utility is series of Unix utility which is currently in development.currently it has a c compiler which is based on early unix c compiler.later versions like v1 or later has in build assambler and linker.it can be used in place of gcc it is good alternative of gnu c compiler
PocketGCC is a port of well-known GNU C/C++ compiler and Binutils for ARM-WinCE-PE platform. Both crosscompiler and native builds are provided, allowing to develop applications for WindowsCE devices with ARM-compatible processor on the go without desktop