Linux is currently the world's most popular operating system when you include the version of Linux named Android.
The Pentel Techniclick 0.5 mm mechanical pencil uses standard 0.5mm (0.02 inch) leads to produce nice fine writing. The point is not pocket safe, making this pencil a desktop only choice.
The Staedtler Triplus Jumbo Graphite pencil 1285-1 2B is a nice pencil for big thick lines.
ProjectLibre is a free open source alternative to Microsoft Project for those project managers who are not locked into connecting to big Microsoft server systems.