You know I'm kinda hard on Thunderbird, but so far it's been way more stable (and memory efficient) than Evolution and KOrganizer which is what I used before.

@mauve and Betterbird can even be a small step up from Thunderbird itself...

@danie10 Honestly I might make my own thing instead. Been toying with this app I wanna make that will combine all my information sources in one place and make then queryable in a coherent interface.