  3D silicon detectors, in which the electrodes penetrate the sensor bulk
perpendicular to the surface, have recently undergone a rapid development from
R\&D over industrialisation to their first installation in a real
high-energy-physics experiment. Since June 2015, the ATLAS Insertable B-Layer
is taking first collision data with 3D pixel detectors. At the same time,
preparations are advancing to install 3D pixel detectors in forward trackers
such as the ATLAS Forward Proton detector or the CMS-TOTEM Proton Precision
Spectrometer. For those experiments, the main requirements are a slim edge and
the ability to cope with non-uniform irradiation. Both have been shown to be
fulfilled by 3D pixel detectors. For the High-Luminosity LHC pixel upgrades of
the major experiments, 3D detectors are promising candidates for the innermost
pixel layers to cope with harsh radiation environments up to fluences of
$2\times10^{16}$\,n$_{eq}$/cm$^2$ thanks to their excellent radiation hardness
at low operational voltages and power dissipation as well as moderate
temperatures. This paper will give an overview on the recent developments of 3D
detectors related to the projects mentioned above and the future plans.
