Recently I bought two mini pumps from Amazon: Giyo GM043, and Kardne mini pump
The Giyo pump is small, but it telescopes out in two sections, so the pumping volume is a lot more than you'd think. Unlike a lot of other mini pumps with screw-on pump heads (which tend to unscrew the valve core when you try to unscrew the pump head), this Giyo pump has a lever lock pump head. It's just a great little pump that works well. Highly recommended.
The Kardne pump comes with a screw-on pump head which has a tendency to leak if you move around even slightly. Luckily it can be easily replaced with a SKS Presta adapter (also sold by Amazon) which is push-on. With the SKS adapter, this pump is pretty awesome.

Kardne pump with original screw-on pump head

Kardne pump and hose with SKS push-on head

I pumped up a 700x25 and a 26x2.1 tire as a test and it sure worked. It takes a lot of strokes but for something I only use twice a year it's perfectly fine. It's also the smallest pump out there. I returned the Giyo and kept this one.
Oh yeah- the flexible hoses on these pumps seem convenient, but they add restriction to the airflow and lead to higher pumping effort. Luckily the Kardne pump lets you leave out the hose and connect the pump head directly to the pump itself.