Advantage2
Used by 6 peoplekinesis-ergo.com ↗

“For a keyboard, I use the Kinesis Advantage2, a funky ergonomic keyboard where the keys are inset in small bowls.”
Toby Alden Interview, Game and web developer · via Uses This 

“I also have a Kinesis Advantage2 keyboard because a few years ago I had serious repetitive strain issue problems.”
Christine Lemmer-Webber Interview, Developer, co-founder of MediaGoblin · via Uses This