I personally use http://www.programmingtutorials.com for most of my app programming needs. Not sure if they have exactly what you guys may be looking for, but they have lots and lots of tutorials on C, C++ and C#, as well as many other programming languages.
I'm learning C right now and feel that any information reguarding what can be done and a few neat tips and tricks here and there are a good thing. Thanks for posting this information and hope that the tutorials site I have listed above helps someone out as well. (They have some really good stuff for newbies on the site as well).
Happy learning