City Roads is a tool created by Andrei Kashcha that displays only the roads on a city map. The colours can be customised and the resulting image can be printed on a mug or exported.
The Instadeq Blog has a great list of things that end users care about but programmers don't, such as "Use the fonts I use in Office" and "emoji support".
Evan Jones published an interesting and helpful article on the differences between ordered data structures and hash-tables, and when is best to use them.
Interaction designer Chris Oilver has compiled a monster list of UX Books using Airtable. The list includes categories, ratings and links to buy each book.
Haki Benita has a great post describing 12 common mistakes and missed opportunities when using SQL, such as being careful when diving integers and avoiding transformations on indexed fields.