We discovered Plus while looking for connections between math and art. Plus has a great collection of relevant articles and interviews. Here’s how they describe themselves:
Plus is an internet magazine which aims to introduce readers to the beauty and the practical applications of mathematics. A lot of people don’t have a very clear idea what “real” maths consists of, and often they don’t realise how many things they take for granted only work because of a generous helping of it. … Plus provides feature articles, which describe applications of maths to real-world problems, games, and puzzles; reviews of popular maths books and events; a news section, showing how recent news stories were often based on some underlying piece of maths that never made it to the newspapers; a puzzle for you to sharpen your wits against; a lucky dip of mathematical curiosities; and opinions on various maths-related topics and news stories.
Plus is now part of the Millennium Mathematics Project, a long term national initiative based in Cambridge and active across the UK and internationally.