Caaact.us is a search history filler website.
You can use it to either fill up your history with "clean" websites (y'know, if your history is empty for whatever reason), or you can use it to screw with your friends and add a bunch of messed up shit to their history.
If you have any ideas for websites to add to either button just contact me at firstname.lastname@example.org
It's pretty simple. Caaact.us assigns window.open() to a variable, allowing it to close the windows it opens so your tabs don't get cluttered. This process can be a bit heavy on some older computers, so watch out for that.
Developed by Juan de Urtubey.