A lot of the KDEPIM devs are working on Kube, which might be what you are after in... a long time. Whenever its ready. Though its been in development for two ye

A lot of the KDEPIM devs are working on Kube, which might be what you are after in... a long time. Whenever its ready. Though its been in development for two years and its soon to release 0.6, so it probably won't hit 1.0 for another two.