Nvidia’s “proprietary” graphics driver. You NEED to update this.

There is an “official” PPA :

sudo add-apt-repository -y ppa:graphics-drivers/ppa

Once this is done, you can install the last Nvidia driver or the previous one by opening in Software Properties → Additional Drivers then selecting the driver you want and clicking “Apply” .

Or you can use a command line :

You need to know what versions are available :

sudo apt search nvidia-driver-*

Then you can install it (example with n°390) :

sudo apt install -y nvidia-driver-390

The team recommends the AppImage version (temporarily) . You can download it HERE.

Once downloaded, make sure it has execution rights by tight-clicking on it → properties then look for security | authorizations tab and check “Allow executing file as a program” or something very similar.

or (replace [X] with your version or just press TAB for auto-completion) :

chmod +x kdenlive[X].AppImage

Now you can double-click it.

You can use the flatpak too (for flatpak on Ubuntu, please take a look at “Add flatpak to Ubuntu” at top of this page)

Command Line :

flatpak --user install flathub org.kde.kdenlive

or open Ubuntu Software and search for Kdenlive. The flatpak version will have “source : dl.flathub.org” under it’s name.

Go HERE, click Download → Linux

The installer comes into an archive. just unpack it then double-click the extracted file to open a very simple installer and install Natron in a folder in your /home/[you].

You can also use the “portable” version. It’s a mere compressed version. Just uncompress  it wherever you want and double-click Natron.

If you can’t double-click it, check inside nautilus preferences (top of your screen “Files” → Preferences. Look for Executable   text files or something similar. Choose “ask”.

ATM, the snap version in Ubuntu Software doesn’t allow you to allow it (ok weir sentence lol) to use file-systems outside your Home.

I prefer the PPA version (with NVENC support to encode using Nvidia graphics card) :

sudo add-apt-repository -y ppa:obsproject/obs-studio && sudo apt install -y ffmpeg obs-studio

No problem : Snap is perfect.

If you really want a deb package :

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 931FF8E79F0876134EDDBDCCA87FF9DF48BF1C90 && echo deb http://repository.spotify.com stable non-free | sudo tee /etc/apt/sources.list.d/spotify.list && sudo apt update && sudo apt install -y spotify-client

PPA !

sudo apt-add-repository ppa:hizo/mkv-extractor-gui && sudo apt install mkv-extractor-qt5

of course, before Ubuntu 18.04 :

sudo apt-add-repository ppa:hizo/mkv-extractor-gui && sudo apt update && sudo apt install mkv-extractor-qt5

The included LibreOffice is a Major version which will never change as long as you don’t change your system version.
To solve this, remove it from Ubuntu Software or sudo apt purge libreoffice*

Then install the snap version in Ubuntu Software (You will see another LibreOffice entry. In description there is source : snap store)
or
snap install -y libreoffice

You can also use the PPA :

sudo add-apt-repository -y ppa:libreoffice/ppa && sudo apt install -y libreoffice

Just go on this thread.

Last versions are posted here in .deb format or archive. Just download it and … well double click

or

dpkg -i unity-editor-[xxxxxxversion]

You can download the last version of the app on the website.

If you want to make sure it will always be up to date without downloading it again from the website, you can use the repository.
Download the key :

wget -O - https://dl.itch.ovh/archive.key | sudo apt-key add -

then

# For Ubuntu 18.04
ITCHIO_DEB="deb https://dl.bintray.com/itchio/deb xenial main"
echo $ITCHIO_DEB | sudo tee /etc/apt/sources.list.d/itchio.list

# For Ubuntu 17.10
ITCHIO_DEB="deb https://dl.bintray.com/itchio/deb artful main"
echo $ITCHIO_DEB | sudo tee /etc/apt/sources.list.d/itchio.list

# For Ubuntu 16.04
ITCHIO_DEB="deb https://dl.bintray.com/itchio/deb xenial main"
echo $ITCHIO_DEB | sudo tee /etc/apt/sources.list.d/itchio.list

# For Debian 8.x
ITCHIO_DEB="deb https://dl.bintray.com/itchio/deb jessie main"
echo $ITCHIO_DEB | sudo tee /etc/apt/sources.list.d/itchio.list

# For Debian 7.x
ITCHIO_DEB="deb https://dl.bintray.com/itchio/deb wheezy main"
echo $ITCHIO_DEB | sudo tee /etc/apt/sources.list.d/itchio.list

Once this is done, you can install the app :

sudo apt update && sudo apt install -y itch

Since Ubuntu 18.04, you should use the installer from the official repository and not from steampowered.com.

sudo apt install -y steam-installer

If your steam app is broken after a system upgrade, you have to remove steam and install it again :

sudo apt purge steam* && sudo apt install -y steam-installer

You will have to log yourself in again and if you added some additional game folders, do it again in View → Settings→ Downloads → Steam Library Folder.

Don’t worry, you won’t lose your games 😉

If you want an up to date version you can download the last one on blender.org, uncompress the archive and use it this way.

If you need Nvidia support or just always want it up to date without downloading again and again… you can use the PPA : sudo add-apt-repository -y ppa:thomas-schiex/blender && sudo apt install -y blender

You can replace  blender with blender-edge for the very last version (in current stable branch anyway)

You can install the snap “Darktable” from Ubuntu Software or use the deb PPA. Both work.

Snap in command line : snap install darktable

‼ If you want it to be able to access USB drives or other file-systems (second storage disk ?) : In Ubuntu Software, Click Authorisations then check it and close
or in command-line : snap connect darktable:removable-media

Last stable version PPA : sudo add-apt-repository -y ppa:pmjdebruijn/darktable-release && sudo apt install -y darktable

Last Unstable PPA : sudo add-apt-repository -y ppa:pmjdebruijn/darktable-unstable && sudo apt install -y darktable

If you want Gimp with the most usefull plugins, just use the PPA with this command. You will have Gimp, the plugins and G’MIC (GREYC’s Magic for Image Computing). Perfect for very “pro” jobs.

sudo add-apt-repository -r ppa:otto-kesselgulasch/gimp && sudo apt install -y gimp-data-extras gimp-plugin-registry gmic

Thunderbird comes with Ubuntu but if you installed a minimal version you can still add it with :

sudo apt install -y thunderbird

if you are experiencing some weird-sized icons / emojis troubles, here is a simple fix :

sudo apt install -y fonts-symbola

Go HERE

Select your distribution and click Download. Once downloaded, if installation process doesn’t start by itself, double-click the file or sudo dpkg -i megasync-xUbuntu_18.04_amd64.deb .

If  your distribution is using Gnome desktop or at least Nautilus as a files browser, you can click on “Nautilus extension” to download this really nice plugin for Nautilus.

It allows you to right-click on a file | folder → MEGA → Upload and put it anywhere you want on your Mega drive (sorry couldn’t resist, Europeans will understand 😝)

Make sure you have gconf. sudo apt install -y libgconf-2-4

Download the application from molotov.tv .

Right-click on the file → properties → security | authorizations and check the options allowing this to execute like a software.

or : chmod +x molotov.AppImage

Now you can double-click it.