Hello!
Fron ccsinfo.com site:
The demo is a limited PCWHD compiler for the Microchip PIC®mcu's: 14-bit PIC16F877, 14-bit PIC16C544, 16-bit PIC18F458, and all 24-bit dsPIC30/dsPIC33/PIC24 DSCs. The demo compiler is licensed for 30 days and has a 2k program size limit.
Link:
hxxp://www.ccsinfo.com/demopoll.php
You can also use mikroc from hxxp://www.mikroe.com/en/compilers/mikroc/pic/
or PICC Lite from Hitech: hxxp://www.htsoft.com/products/compilers/PICClite.php
Good luck!
Cristi