OpenRock Curling (<1Mb)
OpenRock Curling is a free open source curling game with network support. It is written in Java and should run all platforms with JRE 6 or later. If you need to update your Java you can do so HERE
Download:
You can download Openrock Curling HERE. If you have problems with the main download you can choose from 30 or so mirros, but I found some of these didn't work. you'll just have to work through them till you find one that works.