These are several projects and drafts which I like more than the others due to various subjective reasons.
StarTrek game telegram bot.
QR rubik's cube.
Think and draw outside of your tab :).
Mining places and paths of interest from the dataset of geo-tagged photos.
3D-visualizations of several Conway's Life patterns evolving in time.
Intranet communications mining.
[Wolfram VS Peano]
The interactive visualization of Wolfram automata's mapping into Peano curve.
Reverse-engineering and patching Verbarius clock.
Realtime search for images based on speech recognition.
There are many more projects (with short descriptions) on the other projects page.