Google has introduced a Web Share API developers can use to enable sharing capabilities on sites. The API allows users to control how and where data is shared by enabling websites to call on the host platform’s native sharing capabilities. The API can only be used on websites with a secure origin.
I'vRead is a service for keeping track of what books you've read. Seems simple, but it can be rather useful for those of us obsessed with reading like myself. Its web site offers the service for free, and using it is already pretty simple. There isn't even another account to register for. All a user needs to do is add a specific tag, @ivread, to a Twitter post mentioning the book. It allows for some basic searches of the data on their website, but the I'vRead API is where the service really shines.