This is not the most interesting footbridge I've ever visited, but I'm including it here for completeness. It's the next bridge to the east along the Klara Sjö in Stockholm, after the Barnhusbron and Kungsbron.
Depending whether I believe Wikipedia or Structurae, this bridge is either 55m long with a 32m central span, or has a main span of 41m.
Its name translates as "Bridge of Bleaching Islet", supposedly because there was a small island here in the past where fabrics were laid out to bleach.
Anyway, here are some photos, as I have little else to add.