더 매거진 - http://themagazine.madeapp.com/
ebook builder - http://ebookbuilder.co.kr/
mbookharmony - http://mbookharmony.com/
ThreeCore - http://www.3core.co.kr/
ebook.co.kr - http://www.ebook.co.kr/
Appknot - http://www.appknot.com/
Orange Digit - http://www.orangedigit.com/
전자책 공장 - http://blog.naver.com/triplove/
멀티이북 - http://album.name/