Caseless Cheap Chinese electronic tools

[eccerr0r]

"Caseless Cheap Chinese electronic tools" I mean things you get from banggood, ali, fleabay, Am-Zon, etc. like AVR-Transistortester, miscellaneous signal generators, frequency counters, (variable) power supplies, oscilloscopes, low resistance meters, etc., etc. that comes optionally with a case, or comes only with a cheap piece of plastic that barely provides protection to the PCB.

Just wondering what of these (generally flimsy) tools you actually find use (almost) everyday and find indispensable for the price, compared to buying a Fluke or whatnot, if there is an expensive option.

Must be more than just these listed here... Any other neat gadgets found that meet and even exceed expectations?

Don't include things like relay boards, raspberry pi hats, amplifier boards (unless it has a specific use), fixed voltage power supplies including soldering iron controllers, etc. - don't include things that weren't meant to be a standalone tool.

I just find my AVRTransistortester of somewhat limited use. As threadjacked in the other thread, it's cute and fun to play with, but doesn't completely fit my style I suppose. Seeing if there are more interesting stuff out there...