Capacitor Wizard In-Circuit ESR Meter | Howard Electronics
Signstek MESR-100 V2 Auto Ranging in Circuit ESR LCR Meter Capacitor / Low Ohm Meter Up to 0.01 to 100R, Support in Circuit Testing: Amazon.com: Industrial & Scientific
Capacitor ESR Meter with Tone
A simple ESR meter with ATmega8 and open source firmware (a do-it-yourself hobby construction)
Lcd Digital Capacitor Esr Tester Internal Resistance Meter Test In Circuit Capacitor Fault Online Tester - Integrated Circuits - AliExpress
Build an Analog ESR Meter With Moving-Coil Meter Precision | Elektor Magazine