View Vector Files Quickly: PSD/AI/EPS Viewers
Photoshop, Illustrator and Freehand, besides being amazing applications, all have a bad feature; their initial load is pretty slow.
And, when you only need to see what is inside a vector file to find the right one or you don't have these applications (but may need to open vector files), PSD, EPS and AI Viewer softwares can be a quick solution.
They are free applications (for Windows) which loads fast and not only opens the related vector files but can save them as JPEG, Bitmap, GIF, PNG and other extensions. Also, you can resize or rotate them too.
P.S. What would be better is: a single application that can open them all.
Website 2: http://epsviewer.org/