Hi APM price depends on the number and tye of application (web services, database, linux or windows processes, etc).

You can try Solarwinds Network Mapper

You can also try Cisco Network assistant (free tool) if you have Cisco Network.

BMC is very huge and complex. I would suggest you Manage Engine Service Desk Plus (SDP) or Solarwinds HelpDesk. These two are web-based and very soft.