Master PDF Editor is a multi-platform application written in Qt that allows you to create, edit and encrypt PDF and XPS files. 

The tool can be used to create or edit PDF files by adding text, inserting images, split, merge or delete pages from PDF files as well as for annotating PDFs, adding sticky notes and much more.

The application features URIs (remembers copied files, not just text) and pictures support, option to backup / restore the clipboard history and other useful features.

Tunlr, a free DNS service that allowed its users to access US-based on-demand Internet streaming providers from outside the US, was shut down recently.

For those who are looking for a reliable alternative, there's Unlocator, a similar service that you can use to watch Netflix, Hulu, CBS, MTV, PBS, ABC, Pandora and more no matter where you live.

YouTube uses Dynamic Adaptive Streaming over HTTP (DASH) for delivering videos and along with that, it serves the audio and video in two separate streams for some resolutions/formats. For instance, resolutions like 1080p and 480p are available only with separate audio and video streams.

youtube-dl, a popular command line tool for downloading videos from YouTube and other similar websites, was updated recently with proper support for DASH and separate audio and video streams: the tool can now automatically combine / merge / multiplex the audio and video formats offered by YouTube.

Quick tip for Chromium Browser users: The official Ubuntu Chromium Browser beta and dev channel PPAs are unmaintained for a long time but there are a couple of PPAs you can use to get the latest beta and development Chromium builds in Ubuntu.

speedtest-cli tests your Internet speed using the popular speedtest.net website and it supports listing servers sorted by distance, testing against a specific server, you can use it with a Speedtest Mini server and it can even generate and provide a URL to the speedtest.net share results image.

To help those who are used to Photoshop, +Martin Owens has created a collection of GIMP 2.8 tweaks that make it more like Adobe Photoshop.

youtube-dl is probably the most popular command line YouTube (and not only) downloader for Linux but there's a new tool that tries to do things a bit differently.

The project is not new but it wasn't updated for about two years, until recently, when its developer added some new features along with English support (French was already supported).

Update: the latest Google2Ubuntu adds German, Spanish, Traditional Chinese, Portuguese (BR and PT) and Italian support. The new version also includes a menu to change the language, a dictation mode, new setup window along with some other improvements.

Using it, can for instance switch between headphones, speakers and HDMI sound output with just two clicks. Or switch between several sound devices (sinks) without having to go to System Settings > Sound, etc.

In Unity (and not only, because DockBarX, Plank and Cairo Dock also support Unity quicklists), some applications use "quicklists" which allow you to access common tasks for those applications.

But not all applications have quicklists and if you want to add your own or create some custom launchers with quicklists, QLE Unity Quicklist Editor can make that very easy.

JAyatana version 2 was released recently, getting support for Ubuntu 13.10 along with a PPA for easy installation. Update: the PPA now supports Ubuntu 14.04 and 14.10.

Oliver Grawert, SW-Integration engineer at Canonical posted a message on the Ubuntu Desktop mailing list in which he says that Ubuntu 14.10 is likely to start using converged QML applications on the desktop by default.

LibreOffice 4.2, the recently released major update to the default Ubuntu office suite, is now available in its main official PPA, for Ubuntu 13.10 and 12.04. Below you'll find instructions on how to upgrade to this new version using the PPA.