No specific info about version 3.1. Please visit the main page of PICBASIC PRO Compiler on Software Informer.
It is a visual IDE with In Circuit Debugging (ICD) capability.
HI-TECH C compiler for PIC18 MCUs provides denser code for PIC18 MCUs.
Program and debug dsPIC microcontrollers and controller interfaces.
PascalABC.NET is the new generation Pascal programming language.
It is an application development environment for Microchip PIC microcontrollers.
HMS800C Compiler - A 'C' compiler for all abov's 800 core MCU.