The Qt5 port of the user interface is in good shape, successful tests have been made with up to Qt5.5. The development still happens in a branch:[in a branch] (https://github.com/manitou-mail/manitou-mail-ui/tree/qt5), but that will be merged soon into the main trunk, and the Qt4.x version will become a separate branch.
In the meantime, a binary package for Ubuntu 14.04 or 15.10 on amd64
architecture is available in an experimental repository, which can be
deb http://manitou/apt trusty experimental
The package is
manitou-ui, version 1.5.0. It’s built with Qt-5.2.1 on Ubuntu 14.04.
# apt-cache show manitou-ui Package: manitou-ui Version: 1.5.0 Architecture: amd64 Maintainer: Daniel Verite Installed-Size: 2443 Depends: libc6 (>= 2.14), libgcc1 (>= 1:4.1.1), libpq5 (>= 9.0~), libqt5core5a (>= 5.0.2), libqt5gui5 (>= 5.0.2) | libqt5gui5-gles (>= 5.0.2), libqt5network5 (>= 5.0.2), libqt5printsupport5 (>= 5.0.2), libqt5webkit5, libqt5widgets5 (>= 5.2.0), libstdc++6 (>= 4.6) Priority: extra Section: mail Filename: pool/experimental/m/manitou-ui/manitou-ui_1.5.0_amd64.deb Size: 674752 SHA256: 1974bf59cc40d1da67e7fd097b41d78707c012c29d7934610b9ff3a020c14cc4 SHA1: fa6df5ac14a33de5411f06a4139ab86dff3b8536 MD5sum: 937578411e1eff15f5763eb219a1c7a9 Description: Manitou-Mail's user interface Qt-based GUI that acts as a front-end to a Manitou-Mail database. Description-md5: 1fcf376b591321a77a965062e2ea0b97