LXQt

LXQt is a lightweight desktop environment based on the Qt toolkit. It is the result of the merge between the LXDE-Qt and the Razor-qt projects.

Emerge
Get the complete LXQt desktop environment by installing the package:

Keywords
Since LXQt has not yet been marked stable on Gentoo, it may be necessary to add the necessary packages create a keyword file:

Launching LXQt with startx
The command launches LXQt.

Changing the GTK+ themes
The LXQt appearance settings GUI has no support for changing GTK+ themes, so you may want to install to take care of that.

Alternatively, you can change the themes manually, for example using the GTK2_RC_FILES variable:

The GTK+ page of the Arch Linux wiki has more information for configuring GTK+2 and GTK+3 themes.

If you want Qt applications to use your GTK+2 theme, make sure that is installed with the gtkstyle USE flag, and select the  widget style in the LXQt appearance settings.

Applications
Any Qt application can be used with LXQt, but if Qt applications that do not depend on any component of KDE are preferred please see the Qt Desktop applications article.

Support
Support for LXQt on Gentoo can be found in the Freenode IRC channel. Bugs should be reported at the Gentoo's Bugzilla.