Now that everyone is super comfortable with composer, I thought I’d share these two gems which I didn’t know or think about.
This command lists all of your packages installed with composer. This is super handy if you want to include a page in your project, listing all the libraries and versions which are currently installed. It also gives you a description of each library as provided by the package.
This command lists packages which you are using, which have updates available. With this you can have a better understanding of what will happen if you run composer update (depending on your composer.json of course).
Update (July 21, 2016): Guess what? There is even a way to combine the two with one command: composer info -l . This will list all the packages, with their versions and descriptions, and with an additional column of the latest version for each package.