cops
Calibre OPDS (and HTML) PHP Server : light alternative to Calibre content server / Calibre2OPDS
See : COPS's home for more details.
Don't forget to check the Wiki.
Calibre OPDS (and HTML) PHP Server : web-based light alternative to Calibre content server / Calibre2OPDS to serve ebooks (epub, mobi, pdf, ...)
PHPGPL-2.0
Calibre OPDS (and HTML) PHP Server : light alternative to Calibre content server / Calibre2OPDS
See : COPS's home for more details.
Don't forget to check the Wiki.