What are some examples of small web apps that earn their creators a side-income? What are the stories behind them?
The kind of things that I have in mind are hobby projects that earn their creators maybe from low hundreds up to high thousands of dollars per month. (i.e. Somewhat more than just barely covering the server bills, but not necessarily anything close to income from a full time job.)
But feel free to interpret the question broadly if you know of interesting examples that don't fit that.
If you can tell me the stories behind the app - if for example, you are the creator, or know the people involved - that would be even better. For example: What inspired the projects? How much work were they, and how much work are they ongoingly? How have they evolved over time? What kinds of costs and revenues are we talking about?
It's also fine if you don't know any of that, and just have a URL or somebody's blog post to point to.
Side note: This question was partly brought to mind by mathowie
's Webstock talk
, and Fuelly
is an example of the kind of thing I have in mind.