Ariti E-Books (Taiwan) 华艺中文电子书 (台湾） 
https://www.airitibooks.com
It provides access to Chinese ebooks primarily published in Taiwan, Hong Kong and Macau. It covers subjects such as philosophy, religion, natural sciences, applied science, social sciences, history, geography, language and linguistics, and literature and arts.
China Digital Library (Apabi E-books) 中华电子书苑 http://www.apabi.com/uc/?pid=foreign.search&db=dlib&dt=EBook&dc=1.6&hdc=1&cult=CN
Chinamaxx Digital Libraries 中文电子书集献 http://www.chinamaxx.net/
Also known as Chinamaxx Digital Library of Chinese E-Books, and SuperStar Digital Libraries
Note: compatible with IE browser; requires SuperStar Reader (SS Reader)
地方志 http://www.chinamaxx.net/GetBooksZt.action?classNumber=UD
人民画报 https://www.chinamaxx.net/hwzt/classic/list?hwClassify=WS
文史资料 http://www.chinamaxx.net/GetBooksZt.action?classNumber=UW
Duxiu 读秀 http://www.duxiu.com/
More than 1.4 million full-text books
Currently available -- full-text searches, tables of content, and first 17 pages
Browse and forward purchase suggestions to Xi Chen, xichen031@ucsd.edu
