I received the QRP Pocket Tuner kit from Barb, WB2CBA last week. It's a credit card sized T-network tuner designed to handle QRP power.
It took less than an hour to assemble - all of the inductors and capacitors are pre-soldered SMD parts. You just add the switches and SMA antenna jacks.
One I had it together I took it outside and connected it to my 35/17 EFRW and was able to get good matches on 40, 30 and 20m - and confirmed its effectiveness with a 1.7w CQ being picked up on the reverse beacon network. It wasn't exactly a statistically significant testing, but it was cold outside and already dark. I plan to put it through its paces more thouroughly over the next few weeks.
It cost $55 including US shipping. More info can be found at: https://github.com/WB2CBA/POCKET-TUNER-V1
73,
Mike, KL7MJ