A browser extension that hides sticky elements from the page. In case you are curious about the name, I was looking for a mascot associated with cleanliness. This rubber ducky makes the page clean from headers, footers and other mess.
Object relational mapping library for Haskell. It is used in production by several companies and was mentioned in the first edition of O'Reilly book Developing Web Applications with Haskell and Yesod.
This was a part of my Master's thesis on modelling algebraic data types in a relational database. Both for the name and certain architectural decisions were inspired by the Java framework Hibernate.