Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.
Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
Amazon Kindle - Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and...
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
LibriVox - free public domain audiobooks
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.