Users interested in Avr simulator ide 1.51 generally download:
Work with multiple models of microcontrollers from the Atmel megaAVR and tinyAVR lines in the graphical development environment. It features multiple tools for creating functions and program scenarios in the device architecture as well as editing or removing existing ones.
Create, edit and manage software development projects in a specialized environment for Atmel AVR and ARM microcontrollers. There are multiple templates for all kinds of projects available for customization along with the option to create new ones and test them with an evaluation tool.