Cable crimper
Cable tester
Punch-down Tool
* Trims the wires and breaks the insulation
TDR / OTDR
Light meter
* Measure the light power on the other
Toner Probe
* Inductive probe doesn’t need to touch the copper
Loopback plug
Multimeter
* Continuity, wire mapping
Spectrum analyzer
* Identify frequency conflicts
Protocol analyzer
* Use a physical tap or redirect on the switch
Network / port scanner
Wireless packet analysis
* Signal-to-noise ratio, channel information, etc.
Speed test sites