Motovun Jack is a robot that helps maintain the TiddlyWiki project infrastructure. It is not a person, but rather a set of automated scripts and tools that assist in managing the various services and resources used by the TiddlyWiki community.

The origin of the name "Motovun Jack" is a lovable and playful kitten encountered by @Jermolene in the beautiful medieval hill town of Motovun in Croatia. Jack was first adopted as the TiddlyWiki 5 mascot in 2012.