There is a non-regular sequence of workshops on the topic.

The next workshop with the title

"Numerical solution of the Keldysh-Kadanoff-Baym equations"

will be held 11th - 12th March 2019 at the Physics Department of Kiel University

Organization: Michael Bonitz, Karsten Balzer and Jan-Philip Joost
confirmed participants:
Karsten Balzer, Michael Bonitz, Jan-Philip Joost, Andrea Marini, Niclas Schlünzen, Michael Sentef, Gianluca Stefanucci, Riku Tuivonen, Robert van Leeuwen, Claudio Verdozzi,
More information will be posted here soon.

The third workshop with the title

"Non-equilibrium techniques in cosmology and condensed matter systems "

was held 11th - 13th September 2013 at DESY Hamburg, Germany

it was organized by Matthias Garny, Martin Eckstein and Thomas Konstandin

information on the program and the talks can be found here

The second informal workshop

"Solving the Two-time Kadanoff-Baym Equations.
Status and Open Problems"

was held 23th - 25th March, 2010 in Kiel, Germany
Physikzentrum - Leibnizstrasse 15

for details, including program and talks click here