Here is what I use most often these days:
- STM32 Nucleo F411RE development board http://www.st.com/en/evaluation-tools/nucleo-f411re.html
- IceStorm + BlackIce II, ICE40 FPGA development board https://www.tindie.com/products/Folknology/blackice-ii/
- BusPirate v4 https://www.seeedstudio.com/Bus-Pirate-v4-p-740.html
- Sigrok / PulseView + DSLogic logic analyzer https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/182242758729
- Rigol DS1054Z oscilloscope (“overcloked” 100 MHz version) https://www.amazon.com/Rigol-DS1054Z-Digital-Oscilloscopes-Bandwidth/dp/B012938E76
- RTL-SDR v3 https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/
- LimeSDR https://www.crowdsupply.com/lime-micro/limesdr
And what are your favorite devices and software?