mikroC - mikroC is a full-featured ANSI C compiler for 5 different microcontroller architectures. It is the best solution for developing code for your favorite microcontroller
CPIK - the C compiler for PIC18 devices
CCS PCW Compiler - CCS, Inc.
GPUTILS - set of tools for the PIC microcontroller
Embitz - Embitz is a free C/C++ IDE built to meet the most demanding needs of its users working in the field...
Dcoder - Dcoder is an online compiler, a cloud based IDE for mobile and desktops, where one can code and learn algorithms. Now code, compile, run anytime anywhere.