GPUTILS is described as 'gputils is a collection of development tools for Microchip (TM) PIC (TM) microcontrollers. It's intended to be compatible with the manufacturer's tools, MPASM, MPLINK and MPLIB' and is an app in the Development category. There are four alternatives to GPUTILS 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 SDCC - Small Device C Compiler or CPIK.
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