Seanette, they almost all can do it if you talk about the calibre content server
I have tried a few of them and I particularly liked Mantano and Aldiko with a preference for Mantano. But you could just as well use fbreader.
You need to configure your reader to see your content server, it won't do it out of the blue. For that you need to use the opds feed.
For mantano, go to My Shops (or whatever it is called in english, sorry my interface is in french) then add a new catalogue with the adress of your content server.
I have posted some explanation here if you need them:
https://www.mobileread.com/forums/sho...4&postcount=11