I like the Victorinox "Pen" shaped sharpener. It sits in my workbag every day.
Another great sharpener, very inexpensive, is the Fiskars knife sharpener sold by IKEA. Too big for EDC, but great for backpacking or camping duty - and as an everyday sharpener in your kitchen!
My favourite is Byrds Duckfoot. Great concept, works really well and makes sharpening as simple as cutting bread. A little too heavy for EDC, but a great companion to a Sharpmaker, because the diamond coated surface on the Duckfoot makes sharpening really dull blades easier, and the Sharpmaker does the fine work afterwards.