There is a tone of infrastructure and application monitoring tools out there ( uberagent, vmturbo etc., powershell scirpts) to collect proccess details as their main task.

Allthough some could be integrated with NXLog ( lets say by using im_exec, or xm_exec) they have limited  filtering and output  capabilities compared to NXLog.

If NXLog could implement one day one let's say im_perfmon module to collect performance metrics then it could be easily transformed to a top application to this category.