Almost done testing on hardware.  These devices can display a blinking LED:

• ATtiny13A / Cheepit Sparrow
• ATtiny85 / Adafrut Trinket
• Cortex-M0+ STM32L011 / STM Nucleo-32
• MSP430F2012, MSP430G2452, MSP430G2553 / TI Launchpad
• PIC16F1619 / Microchip Curiosity
• STM8S103F3P6 / Noname breakout board

I haven't been able to program my SiLabs 8051 using a ToolStick board.  If someone can suggest another 8051 which is easy to use, I'm all ears.