Phoneboard is a free alternative to ZXW Tools dongle and Wuxinji.  The software is available on both Linux and Windows, but not MacOS.  It’s also not as detailed as ZXW tools (schematics, diode mode readings, multi-layer trace diagrams, etc.), but for basic troubleshooting, it will do.  It is FREE, so how can anyone complain about that?  Another great thing about it is that as of version 1.4, it’s available in 7 different languages (English, Polish, Hungarian, Cambodian, Italian, Finnish and French).

You can download the latest version from it’s official website below.