[zaphodias]

I use K-9 Mail too, and while I think it's great (fast and customizable) I think it could use some gestures or more in general a UI revamp to reflect the fact we are not using Ice Cream Sandwich anymore :)

[Leace]

Actually K-9 already has a nice UI in "master" branch but for some unknown reasons it's not released yet :(

[zaphodias]

Thanks for the heads up, apparently they are (were) working on it: https://github.com/k9mail/k-9-design