I am a (web) programmer by day, writer by night. I've written a couple novels, unpublished so far. A few weeks ago I sat down to sharpen the saw and after struggling to come up with something to write about, I realized I could use a tool to give me random writing exercises so I can focus on the writing itself. Something like a writing prompt, but more compelling and interactive. Inspired by the practice of coding katas, I decided to create WriterKata. It has a hundred or so exercises so far, a social aspect, and some slight gamification features. Any writers in the HN sphere are invited to check it out, give feedback, etc. It is 100% free.<p>Of technical interest, this is my first Node/Express site, coming from the Rails world. I enjoyed the low-level nature of it but did miss a lot of the built-in features Rails gives you. Don't know what you got til its gone, I guess. :-)