There are lots of folks running OPDS servers for personal use. The few most common ones are ubooquity, elibsrv, calibre, and cops. Lots of eBook readers also s

There are lots of folks running OPDS servers for personal use. The few most common ones are ubooquity, elibsrv, calibre, and cops. Lots of eBook readers also support OPDS now- I use koreader on my Kindle, and Moon Reader on my Android.