Looking for 3rd party tool

[Christian]

Hi everyone,

I think there used to be a tool that could visualize my arbtt data in a 
"you did A for 3 hours than B for 2 hours" way. I can't find it anymore. 
:( Does someone remember, and does that still exist? I am pretty sure it 
existed because I always wanted to extend it to handle "gaps" better 
(like 5 min chats in a 2 hour exam preparation session).

Thanks and cheers!
Christian