An explanation of how to detach and re-attach a program in a different TTY/PTY. It has some caveats, but it's very simple to implement. Similar to reptyr and neercs.
A very nice introductory series on D3.js. You start off by making a simple pie chart and end up with a donut showing tooltips, parsing a CSV and with selectable pieces of data.
some tips and warnings (mostly warnings) about using ssh-agent. A little too much about the dangers and not as much about fixing things as I'd like, but certainly an interesting read.