You may have recently heard about a new social network called Mastodon. Mastodon is an open source, completely free social network that is similar to, and on some level competing with, Twitter. However there are some important differences between Twitter and Mastodon. Here’s what Mastodon is, and what it isn’t.

Uber has rolled out its UberRUSH package delivery service in initial locations San Francisco, Chicago, and New York City (Manhattan). UberRUSH is basically for business packages what Uber is for human passengers. While at first blush it may seem like it is competing with services like Amazon Prime Free (Amazon’s same-day delivery service) or even Amazon Prime Now (the Amazon one-hour delivery service), Business Insider is calling UberRUSH the “FedEx killer”. That’s because while individuals can use UberRUSH, it was really created for merchants and other businesses to use to get their product to local customers quickly and efficiently (and of course let’s not overlook the ‘cool’ factor).

Move over, Gmail, Google Apps, and Outlook, there’s an old kid in town: Amazon WorkMail. With Amazon WorkMail, Amazon moves firmly into the ISP webmail provider space. But only for businesses.

While Skype Translator was announced last year, Skype is now accepting Skype Translator registration signups. The first roll-out of the Skype voice translation tool will be Skype Translator for Windows, with Skype Translator for Mac to follow. (For a Skype Translator demo, see below.)