These are very cheap STM8S003F3P6 development boards, however, they demand a SWIM compatible programmer to utilise.

There is a `DE' mark on the board which may suggest that Danger Electronics is the manufacturer, however, DE says the device is an STM8S103 but it's actually an STM8S003.

The silkscreen also names these the STM8 Minikit 20 but the product page at Danger Electronics names them the STM8S.

    VDD SWIM GND NRST   USB
RST                     PWR
BTN
                    VIN GND

PD4          LED1         PD3
PD5          LED2         PD2
PD6                       PD1
RST                       PC7
PA1                       PC6
PA2                       PC5
GND                       PC4
VCAP      VDD VDD         PC3
VDD       GND GND         PB4
PA3                       PB5

Install STM8Flash and SDCC.

hg clone http://hg.kewl.org/pub/blinky++
cd blinky++/STM8S_Minikit_20
make
make install

Product page