IMAGE is a magnetometer network in Northern Europe. The prime objectives of IMAGE are to study auroral electrojets and moving two-dimensional current systems.
PECASUS is an international consortium, lead by FMI, producing space weather advisories for civil aviation on request by ICAO.
MIRACLE is an instrument network oriented towards mesoscale studies of auroras. The site contains e.g. keograms for quickly looking through auroral images.
Auroras Now! is an old site containing plenty of information about auroras. The site is no longer actively updated.
Tomoscand project consists of its own network of low Earth orbit (LEO) satellite receivers, as well as an algorithm for multi-instrument ionospheric tomography, producing 3D information of ionospheric electron density.