Following tools will help you detecting outdated software.
Natural Docs
Perl documentation effort:
The Real Difference Between Git and Mercurial
Some interesting read:
Go linux, trash windows
In the end, windows will eventually die.
Linux is not only better than windows, it is also easier to install and maintain.
Introduction to Git, Part 1 » phpmaster
Beginners guide to unix
Want to get started with a real OS. Here is some guide: http://matt.might.net/articles/basic-unix/
A good guide for windows and powershell users.
64 porting
An interesting article about 64 vs 32 bit.
Windows and Linux are covered, but it might be of interest for any c-programmer.
How long does it take to make an iPhone app
What is the time sir?
A very good read and explanation on leap-seconds.
http://cacm.acm.org/magazines/2011/5/107699-the-one-second-war/fulltext
Do you cater for leap seconds in your code?
Easy explanation on unicode
Understand UTF-8, -16, -32. Short article that explains it all in a few words. A good start.