Scribus is a free desktop publishing software, which can be used to edit EPS file. It is a cross platform free EPS editor available for Windows, Linux, and MAC.
GIMP
GIMP is an image manipulation software, which does not natively supports EPS files, but can be made to open and edit EPS with the help of Ghostscript.
Paint.Net
Paint.Net is another famous and free software to edit EPS file.
LibreOffice Draw
LibreOffice Draw is a part of free and open source office suite, LibreOffice. This is a cross platform software and is available for Windows, Linux, and MAC.
Apache OpenOffice
Apache OpenOffice is another good open source EPS editor software.
IrfanView
IrfanView is a free image viewer, where you can easily edit EPS files.
XnView
XnView supports a wide range of image formats, which includes EPS as well. This software also lets you edit EPS files with very few options.
Photomania DX
Photomania DX is another good EPS editor software, which is free for personal use. It has very few image editing options.
To know more about these software click on the icon below.