dotEPUB is software in the cloud that allows you to convert any webpage into an e-book.
For content consumers (readers), we have developed a bookmarklet for modern browsers (desktop or mobile). And, if you are a Chrome or Firefox user, you can install the dotEPUB extension in your browser.
For content producers (editors, authors), we offer Creator and a widget. Creator lets you make an e-book from a text of your own. The widget helps your users getting the content of your website in e-book form (see the tips for webmasters).
For more customizable results, developers can use our API (read the documentation).