Sitemod - Modify any website in real-time. Share it with the world.
Grapedrop - Build free, responsive, website pages with an easy to use online builder. Design and publish online immediately or export the code and host it wherever you want
IPconfig.pw - The best tool to view information about IP addresses
mmm.page - Dead simple, drag & drop personal websites
Antideo - Email, IP address and phone number validation API service
Graphite - Graphite is a highly scalable real-time graphing system.