Based on Isogeo RESTful API, the QGIS plugn si the best way to access your or external geodata without moving away from your favourite GIS software.
Video guided tour
A bit old and in French, but this video give you a good view on the plugin.
It's been registered during a webinar in 2017:
Plugin is available in 2 languages:
- French ;
Plugin is developed under GNU LGPL v3 license.