A short list of Coffee Outlets with free WiFi in Reykjavik.

 Te & Kaffi - Austurstraeti  WiFi Quality: Good Power Outlets:None    Work environment: A Little bit too crowded

Te & Kaffi - Laugavegur  WiFi Quality: Poor to Good   Power Outlets: Electric outlet box in the back of the room   Work environment: Good, not too much noise, small tables

Te & Kaffi - Adalstrateti WiFi Quality: Excellent    Power Outlets: Two, on the wall. Work environment: Good not too much noise

C is for Cookie - Tysgata  WiFi Quality: Excellent Power Outlets: Two or more, on the wall.  Work environment: Good not too much noise, small tables 

 * WiFi Quality = Internet speed + connection between computer and the router (Poor, Good, Excellent)