As a person who commonly writes EPS by hand heres how I deal with eps files. Mostly nearly every graphics and desktop publishing app can deal with eps. It being the second most common vector format available on the planet (after pdf, but then pdf is a direct descendant of eps).
So you can open eps in Word, Open office, mathematica, inkscape, gimp, corel draw... and because its the primary tech behind adobe in all adobe apps as well as nearly half of all mediun end printers.
Unfortunately eps is not a simple format so all kinds of convolutions may apply. For example font data may be omitted, or it may use advanced features not available to you. Most commonly you can deal with this by using Ghostscripts ps2ps command.
The other standard way is to just distill the eps to pdf with either Ghostscript or acrobat Distiller. This removes all the dynamic features of eps and flattens the graphic.