Order yourself a ProtoLeap Starter board.
USB to SPI converter
Independent 3.3V and 5V supplies
Wall adapter connection for up to 1A
Micro USB connection for up to 500mA
LxW = 2.95"x 2.0"
15 columns x 10 rows
2 sets of rails for power
6 rows of rails to be used for extra board connections or power rails
1xTSSOP up to 8 pin, narrow and wide SMD footprints
1xSOIC up to 8 pin, narrow and wide SMD footprints
1xSOT23 up to 6 pin, SMD footprints
2x0603 and 0805 SMD footprints on top layer
49x0603 and 0805 SMD footprints on bottom layer