Interactive Linux Kernel Map

http://www.makelinux.net/kernel_map

Open Source Guide for Small and Medium Enterprise / Business

"Open source software is the most significant all-encompassing and long-term trend that the software industry has seen since the early 1980s”. This is one of the conclusions of a recent IDC report [IDC 06], which shows how much the perception of FLOSS (free/libre/open source software) has changed in the recent years. Right now, the majority of developers in the world are using open source software [Forr 07], and FLOSS platforms are used in one way or the other by a large share of companies."

http://www.cyberciti.biz/tips/open-source-software-adoption-guide-for-business.html

How to become a good theoretical physicist

"This is a web site (still under construction) for young students - and anyone else - who are (like me) thrilled by the challenges posed by real science, and who are - like me - determined to use their brains to discover new things about the physical world that we are living in. In short, it is for all those who decided to study theoretical physics, in their own time."

http://www.phys.uu.nl/~thooft/theorist.html