I have a history of creating and contributing small applications and lines of code to various open source projects, here are some.
I love Markdown and I love editing Markdown in Atom. But I also love the exposure that Medium offers, and whilst I admit it has a great editor, I like to be able to write offline and I like having a central repository (i.e. Git) of my work for collaboration, consolidation and other purposes.
As a (very) frequent writer and editor I often find myself writing and correcting the same words over and over again. Or in preparation for publishing I have to repeatedly undertake the same steps, such as adding short codes or formatting links.
I have loved Kapeli's offline documentation browser, Dash for a while now and have been intending to start contributing to it for the best part of 2015.
Are you looking for smart answers to dumb questions? Then you might enjoy 'Answers Against Humanity', based on that 'award' winning game, Cards Against Humanity.