Get list of applications

We just had that exact same discussion here a few weeks ago. Access to applications is controlled by group membership. Listing applications will not help you.

How about creating a constant of 'List of Application' type and then using that constant wherever required. 
Like Stefan mentioned, the user might not have access to all the apps, then, in that case, you can reject that app through the reject() function in the code. 
But this will add a dependency to update the constants whenever a new app is created in the system,