WMail is a free, open source desktop client for Gmail and Google Inbox, available for Linux, Windows, and Mac.
The application is a wrapper for Gmail / Google Inbox with unlimited account support, on top of which it adds features such as native desktop notifications (notification bubble and sound), unread email counter in the tray, and more.
Prime Indicator is an AppIndicator for laptops with Nvidia Optimus, allowing users to quickly switch between Intel and Nvidia graphics.
The original Prime Indicator hasn't been updated since February, 2015. André Brait forked the indicator (while also using code from the Linux Mint version), improving it with both new functionality and bug fixes, and the new app is called Prime Indicator Plus.
Canonical launched the Canonical Livepatch Service recently, an "authenticated, encrypted, signed stream of livepatch kernel modules for Ubuntu servers, virtual machines and desktops", applying critical security and vulnerability patches without requiring a reboot.
The new service is commercial (commercial support subscriptions start at $12 / month), but it's offered for free to the Ubuntu community, for up to 3 systems.
Ubuntu 16.10 (Yakkety Yak) has been released. The new version ships with Unity bug fixes, updated applications, including the GNOME 3.20 stack, an alternative experimental Unity 8 session, along with various under-the-hood improvements.
Vivaldi, the web browser aimed at power users, was updated to version 1.4 (stable) today. There aren't as many changes as in the previous release, but a few interesting improvements.
The latest Vivaldi 1.4 ships with Theme Scheduling, a new feature that allows setting the browser to automatically change the theme based on the time of day. This is useful if you want to use a dark theme at night, change the theme based on your schedule, and so on.
Avant Window Navigator is a dock / task manager for Linux, which was very popular a while back. Its developers lost interest with the introduction of Unity, and after several years of inactivity, the project was taken over by a new maintainer.
Unfortunately, the new maintainer isn't too active either, but at least Avant Window Navigator was updated to work with recent Linux distributions.
Mike Baum created an Avant Window Navigator PPA for Ubuntu 16.04 / Linux Mint 18, because the official AWN PPA wasn't updated in a while.
There are a few AWN applets from this PPA that can't be installed, so I decided to rebuild the packages in the main WebUpd8 PPA. Update: I added Ubuntu 14.04 / Linux Mint 17.x packages to the PPA.