The Proteus VSM system level simulator is used alongside MPLABš X IDE in many of the Microchip RTC classes and this product licenses all of the 8-bit processor variants that are used in those classes:
Proteus VSM for RTC 8-Bit Bundle contains everything you need to develop, simulate and test your embedded system designs based around selected Microchip microcontrollers. Each purchase includes a professional copy of the ISIS schematic capture package, the VSM simulation engine, a full set of virtual instruments, and thousands of embedded peripheral models. The software integrates easily with the MPLAB X IDE, acting as virtual hardware during debugging and provides you with the ability to simulate the execution of your firmware without the need for a physical prototype.