There's decibels of course and decilitres are sometimes used, but otherwise only centi has survived (centimetre, centilitre) in the real world. Hectare is the unit to all intents and purposes, no-one uses ares do they? Angstroms are gradually losing the battle to nanometres.
Decilitres, decagrams, hectograms etc. are all heavily used throughout mainland Europe.
Am I the only one around here old enough to remember the REAL units for small capacitances - miki-mikes. Hint: Think micro - micro ...
Really? Like MarkT, I'm mostly basing my experiences on food products. For example at http://sverigeonline.se/ we see thing in packages of "300 g", "1,4 l", etc... I wouldn't entirely trust what is written on packages exported to the US, but that's an actual Swedish website, right?