http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html: This link contains more instructions on how to set up a commands database. Once you have this file, you can even configure your favorite text editor to run a tool to check the code on demand.

http://clang.llvm.org/docs/Modules.html: This link presents more information on the Clang implementation of C/C++ modules.

http://clang.llvm.org/docs/LibASTMatchersTutorial: This is another tutorial on using AST matchers and LibTooling.

http://clang.llvm.org/extra/clang-tidy.html: This has the Clang Tidy user's manual along with the manual of other tools.

http://clang.llvm.org/docs/ClangFormat.html: This contains the ClangFormat user's manual.

http://www.youtube.com/watch?v=yuIOGfcOH0k: This contains Chandler Carruth's presentation for the C++Now, explaining how to build a refactoring tool.