The terrible PIC ecosystem
earth.li
earth.li
Atmel, which was made popular by the Arduino movement, the avrfreaks board before that and its generally amenable architecture to a high level language, was recently bought by Microchip[1], the walled garden guys.
Both had processors that had fan bases, Atmel had open source tools, Microchip closed source. But the guys with the closed source had the cash to buy Atmel when the ARM architecture started eating the 8/16 bit market alive.
What does that say?
[1]http://www.nytimes.com/2016/01/20/business/dealbook/microchi...
You can use the assembler, linker and other tools that come with mplabx in a traditional tool chain, with Makefiles, scripts, and your editor of choice.