Vivaldi is a new web browser based on Chromium / Blink, especially created for users who "have problems fitting all their open tabs on one screen". The browser is developed by Vivaldi Technologies, whose chief executive and founder is John von Tetzchner, former Opera CEO and co-founder.
Pump.io is a "social server with an ActivityStreams API". It’s from the same people that originally created StatusNet, which has now become GNU social. Pump.io servers are nodes in a federated social network: when you have an account on one, you can interact with others on that server, but also others with accounts on other pump.io servers. It’s free software, so you can host your own instance and connect to others, wherever their servers may be.
The Opera team has just released the first stable edition of the Opera browser in 2015 and the application is now at version 27 and change. A couple of new major features have been implemented and a ton of smaller fixes have been added.