TheSquareFoot - Easily find the right office space for your budget
ipstack - ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.
Pivotdesk - Office sharing marketplace
ipapi - Web analytics with IP address lookup and location API
Deskimo - Workspaces on demand, paid by the minute
ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database