Go to
http://www.gronmayer.com/it/
and on the right-hand side is a search box.

Enter the name of the library or file you need and when you find the repository that has it, click the "Click to install" icon to add that repository to your Application Manager.

That should resolve the dependencies that are preventing the application you want from installing.

(p.s. I and others have posted this several times before... try a search next time before starting a new thread. Thanks.)