ERPXE is described as 'project simplifies the process of installing and customizing a Multi-Boot PXE server'. There are four alternatives to ERPXE for Windows, Windows S and Linux. The best alternative is FOG Project, which is both free and Open Source. Other great apps like ERPXE are Serva 32/64 (Freemium), AOMEI PXE Boot (Paid) and Tiny PXE Server (Free).
FOG is a free open-source cloning/imaging solution/rescue suite. A alternative solution used to image Windows XP, Vista PCs using PXE, PartImage, and a Web GUI to tie it together. Includes featues like memory and disk test, disk wipe, av scan & task scheduling.
AOMEI PXE Boot (Preboot eXecution Environment) Free software enables you to start up multiple client-side computers within LAN through the network booting from ISO image file on a server-side computer for system maintenance and optimization.