Linux apps that run anywhere. Download an application, make it executable, and run! No need to install. Distribute your desktop Linux application in the AppImage format and win users running all common Linux distributions. Package once and run everywhere. Reach users on all major desktop distributions. http://appimage.org/
TeXstudio is an integrated writing environment for creating LaTeX documents. Its goal is to make writing LaTeX as easy and comfortable as possible. This package comes bundled with TeX Live so that you don't need an existing LaTeX installation in order to use this.
Thunderbird is an email client that allows you to read, write and organise all of your email messages. It is compatible with most email accounts, including the most popular webmail services.
VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols.