Alchemy Network Monitor PRO 

Alchemy Network Monitor monitors your network servers and business-critical applications availability and performance and immediately alerts you if a server gets out of order.
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LanTool 

Manage your network. Determine, what computers are connected and who's logged on. Remotely shutdown, restart, lock the systems or logoff users. Get useful information about a remote system such as IP & MAC addresses, Transfer files, etc.
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