Profiling

lttng - kernel/user call profiler/tracer, low overhead
sysdig - strace on steroids
kernelshark - graphical trace-cmd viewer

Debug

Binwalk - binwalk -e -M -d 2 -X /tmp/dump -X - extract raw compressed streams -M - search file in file, -d specifies depth
d-feet - dbus browser, available in distro

CA

XCA

Data recovery

testdisk - recover partitions and files
gpart - guess partition table
veles - binary analysis

HTTP testing

'slowhttptest' - test slowloris-like DoS

Hardware

lstopo - show memory/PCIe architecture - package hwloc/hwloc-nox