PC-lint from Gimpel has set the standard for static code analysis: it is used by many companies developing safety critical applications. Additionally PC-lint can check the MISRA rules which are standard for many coding guide lines. PC-lint has detected many subtle bugs in my sources. Thank you, PC-lint!
CodeWarrior classic provided a plugin for the PC-lint compiler: To bad that this does not exist in the eclipse based CodeWarrior. You might think that given PC-lint so popular, there should be an eclipse plugin available? Yes, there are many attempts on this: all of them did not work well enough for me. The good news: There is the Linticator eclipse plugin. The bad news: it is not for free.