The ALPO seminar (by its Finnish initials) gather Finns interested in open source GIS software, data and solutions derived from those. The objective is to share experiences and knowledge about their use and benefits.
This [http://wiki.osgeo.org/wiki/ALPO_2015 years seminar], features a full day of presentations open and free to anyone interested, although you should be warned that the main language is… Finnish. Among other, the topics cover local journey planner to be rebuilt using open source technologies and data, use cases with Geoserver and mapping bioenergy using open source software.
The seminar is organized by the [http://wiki.osgeo.org/wiki/Category:Finland OSGeo Finland Chapter].