Daniil Elovkov shows how to define a projectional editor that combines graphical, tabular, textual notations, lets one either mix or seamlessly switch between those, and is deployable to the web.
Martin Thiede introduces and demoes RText, an open source textual DSL framework that can be used with almost any text editor or IDE.
Hugo Duncan introduces Ritz, a set of tools for debugging, inspecting, project reloading, with codeq and lein integration, showing how to use it with nrepl.el in Emacs.
Bodil Stokke introduces the productivity benefits of Catnip, a text editor with REPL (Read Eval Print Loop) functionality integrated into the Clojure environment.
Bill Odom presents the essentials of Vim and demoes advanced techniques, important settings, useful customizations, scripts, plug-ins, tips and tricks.