MTePub is a project mainly written in Perl, it's free.
Movable Type 5でEPUBを出力するためのプラグインとテーマです。 | Plugin and theme for creating EPUB on Movable Type 5
Quick start for MTePub plugin
1.Unzip MTePub plugin zip file. 2.Upload 'plugins', 'mt-static', and 'themes' folder to directory of Movable Type 5 installed. 3.Log in to Movable Type 5. 4.Create new blog and apply 'EPUB' theme. 5.Write entries. 6.Rebuild blog. 7.Click 'Create ePub' button on right-top corner of Movable Type admin screen.