CPIK is described as 'the C compiler for PIC18 devices' and is an app in the Development category. There are four alternatives to CPIK for Linux, Mac, Windows, Eclipse and Eclipse Che. The best alternative is MPLAB X IDE. It's not free, so if you're looking for a free alternative, you could try PicCBuilder or GPUTILS.
The PicCBuilder is an Eclipse plugin for allowing the use of Eclipse CDT as the editor and builder of projects for Microchip PIC microcontrollers. It creates makefiles that involke the C30 or C32 toolchain to generate the binary files. - ecdpalma/piccbuilder