TL:DR; Wayk Now lets you take control of a remote computer, or allow an authorized user to take control of your computer.
Wayk Now lets you take control of a remote computer, or allow an authorized user to take control of your computer. Wayk Now is free for personal and commercial use and currently available on Windows, Max OS X and Linux.
Ping Scanner Pro has 18 network tools, it can ping one address a lot of times or a lot of addresses one time. It will also tell you what MAC addresses are on your subnet, and perform DNS lookup or reverse DNS lookup. It does Traceroute, Whois.
Receives Wake-On-LAN magic packets and starts up virtual machines. Supports Microsoft Hyper-V, Virtual PC 2007, Oracle VM VirtualBox, VMware Server, Workstation and Player. The built-in service allows to run machines without logon to host machine.
TCPDUMP for Windows is a clone of TCPDUMP for UNIX systems, the popular command-line packet capture tool. An advantage of TCPDUMP for Windows is that it (1) supports 1Gbit networks and (2) does not require any third-party preinstalled drivers.