This Kotlin SDK contains Readium's Licensed Content Protection module. The latest version is 1.1.1. Readium provides technology designed to accelerate the adoption of EPUB 3 and the Open Web Platform by the Digital Publishing Industry.
Flexpaper is an open source document viewer--and it is beautiful. The Flexpaper API lets you incorporate your publications into other applications. Flexpaper works on virtually any device and is, no surprise here, flexible. It can display in HTML, HTML5, Adobe Flash or any combination of these.