Main Page | See live article | Alphabetical index Eidolon Software is a company that creates software for NeXT's NeXTSTEP and OPENSTEP operating systems, as well as Apple Computer's Mac OS X. Eidolon Software is most commonly known in the NeXTSTEP/OPENSTEP community for it's PopOver mail client software. Eidolon Software's name is inspired from the meaning of eidolon meaning "ideal" or "ghost" (etymology from Greek for image). This article is a stub. You can help Wikipedia by fixing it. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.