There are several ways of installing applications for your Ubuntu Linux. One easy and popular way is to click on Applications and go to Add/Remove software. There you have lots of great applications to choose from. You can browse by category or by most popular. There is also a good website to go to if you cannot find something in the Add/Remove software. The website is get deb. There you will find additional software. The applications are compiled in a .deb file. You can think of the .deb file as a .exe file for Windows. You download the .deb file and then install it. The site has top ten applications but you can also browse through the categories and find applications that you are interested in.