1. A computer program product to identify concurrently used applications based on application state, the computer program product comprising: a computer-readable storage medium having program code embodied therewith, the program code executable by one or more computer processors to: upon determining that usage of a plurality of applications, including a first state of a first application of the plurality of applications, satisfies a criterion for identifying concurrently used applications, designate the plurality of applications as a first meta-application comprising a uniquely identifiable set of concurrently used applications, wherein the first meta-application has an associated criterion for launching the first meta-application; and upon determining that subsequent application usage satisfies the criterion for launching the first meta-application, programmatically invoke at least one of the plurality of applications.