Lists(Edit)

KD1JV Designs

Basics(Edit)

Signal Tracer and Injector

RF Probe

Marker Tone Generator

Wikipedia: Audio Quality Measurement

Digital Breadboarding - Making a DIY version of this would be a good project that would help future projects.

Antennas(Edit)

Smart Dummy Load

Cheap Antenna Tuner with SWR Meter

W8WWV - Analyzing Three Antenna Analyzers

Low-power 'Tenna Dipper

Grid Dip Oscillator

Component Test(Edit)

LC Meter (PIC-based)

Everything Else(Edit)

Field-Strength Meter

Robustness test; see application: