I cannot recommend this site highly enough.
Bernd Schneider's site covers all of Star Trek, demonstrates wide and detailed knowledge, and his particular interest is equipment, technology and starships.
If you want [Voyager]-related scans or screenshots, please note that many, most or even all that are on his site are already on mine. That warning might possibly save you time. Obviously, as he deals with all of Star Trek, he does not have the time or space to devote as much to [Voyager] as my all-[Voyager] site. (Bernd Schneider once told me he found my site very useful. Once I remember seeing something there, wondered about downloading it because it was there although I already have it but buried deep in my filing, then on looking at it more closely I saw the credit he had put on it, crediting my site (and I appreciated that he had credited me)! However, not everything from my site is credited - this means that you cannot swiftly tell, if you have downloaded a lot of stuff from here, whether you already have it. But if it is [Voyager] stuff, chances are that it is already on my site.)
If you want non-[Voyager] Star Trek stuff, the above site is a must-visit. It comprises mostly scans with labels and technical articles. There are also screenshots which are organised in my opinion in a better way than their source TOSTW, or many screenshots are very nice scans from books.
In January 2004 Ex Astris Scientia honoured me with its Excellentia Award. I have received several Awards over the years but I am so proud of this one, because it comes from a site I greatly admire. For a long time I indulged myself and kept it on the site.