For me personally, I guess netcat, socat, tcpdump and SSH (for tunneling) qualify the most. I'm working in a Windows environment where I'm usually not allowed t

For me personally, I guess netcat, socat, tcpdump and SSH (for tunneling) qualify the most. I'm working in a Windows environment where I'm usually not allowed to install new software, and I miss those by far the most. Often, I need to do a test run of something which involves slightly rerouting network traffic and I'll spend half a day hacking together some horrible "solution" that I could literally have done in 3 lines of bash code on a UNIX-like system. Maybe throw hexdump for looking at binary stuff in there too. Edit: Oh, and of course GDB! If only I could have the accumulated days of log forensics back that were done just because it's still faster to do that instead of getting the visual studio debugger to work remotely. Whatever happened to KISS? -_-