I genuinely quite like this one. Although you can't change gear from the drops, it's still useful for touring bikes where you want the simplicity/repairability of bar-end shifters - and you can run your shifters in friction, and change through all your gears in one swoop. At £86ish per pair, not including shifters, they are expensive, though.
And another one:
http://www.gizmag.com/retroshift-cx-cyclocross-levers-shifters/26660/?utm_source=Gizmag+Subscribers&utm_campaign=a8d30fceb5-UA-2235360-4&utm_medium=email
http://brimages.bikeboardmedia.netdna-cdn.com/wp-content/uploads/2012/01/retroshift-brake-lever-mounted-friction-shifter3-600x400.jpg
I genuinely quite like this one. Although you can't change gear from the drops, it's still useful for touring bikes where you want the simplicity/repairability of bar-end shifters - and you can run your shifters in friction, and change through all your gears in one swoop. At £86ish per pair, not including shifters, they are expensive, though.