I hate to admit it but Rail Europe is quite convenient for making reservations only for those who already have a rail pass. But their reservations are way overpriced and cannot be changed once paid for.

Is there another way to make reservations online? I know you can always make them at the train station, but lines can be quite big at times and the online convenience would be great, if possible. I know DB offers online reservations but only for travel within Germany. None of the other railroads do, to my knowledge.