Writing A "Generally" Useful App (Day Lineup/Total Dayify)
Although not the most famous application, it solves a low-level problem and it really emphasizes on creating something that you would use. Solving a problem for yourself in a shared environment indicates that people inside that environment will likely also be reciprocating towards that solution. For me, it was a two-year-old issue of being unmotivated, and assigned work creeping up when days whoosh past and result in the eventual realisation that there’s only a few days left until some major event is due.