IPAppmon 

A life-saver application for those MIS specialists needing to guarantee up-time on desktop application style server utilities. Now network monitoring and even automatic re-starting of failed applications is possible.
network monitor tcp/ip tcp server alive application

IPSpaceMon 

SpaceMon makes it easy to watch network storage space and alert you from your current network monitoring package* or simply rely on notification email sent by SpaceMon when a resource dips below the amount of free space you specify.
dasd network monitor space storage drive disk