François Riguet made a nice presentation for Sondes Locales forum (in French).
Note the presentation actually used during the workshop has been made by Nicolas Delorme and is available at the Sondes Locales site (in French).
File size: 3.94 MB
Roughness characterisation presentation that David Nečas gave in 2012 in Greifswald.
File size: 3.36 MB
Presentation called Use of Gwyddion libraries for your little tasks that Petr Klapetek gave in 2013 at SPM workshop in Ledince.
File size: 1.28 MB