I think there is a plenty of tutorials and sample codes in this section. What language would you like to use? What is your general programming experience?
I don't know if you can find step-by-step tutorials on programming insim apps, but you can get some of the many open-source projects, which lie in this section: http://www.lfsforum.net/forumdisplay.php?f=179
Then you can either start tweaking with them, or start from scratch, by going online and learning the basics of the language you would like to be programming your application in. Or... you could do both.