The fastsimple.com site contains several small web apps.

Internet & Browsing
Firescan Scan firewall.
Multiload Create a multiload URL.
Reload Reload a page every 5 minutes.
Whoami Your IP and related info.
Whois Whois data, DNS data, IP, GEO, ....
Separator Separator for use in Chrome bookmark folders.
Favicon Replace favicon of bookmark.
Development
Convert Conversions.
Forward Jump to page, hide source.
Ultralink Create link that keeps working if a destination stops working.
Loadtest Site stress testing.
   
   
   
Information
Bitcoin Up to date Bitcoin and Ethereum data.
Knowledge Knowledge base about science, technology and entertainment.
Keirsey Dutch personality test.
Maps Google maps with some extra's.
Fun & Games
Cube Learn how to solve a Rubik's Cube.
Wca World Cube Association upcoming events.
Games Game prototypes.
   

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