YouCompleteMe, a Fast, As-You-Type, Fuzzy-Search Code Completion Engine for Vim
For those have a project with an existing .clang_complete file (used to pass options to the compiler with the clang_complete Vim plugin), this gist [1] will allow you to reuse that file with YouCompleteMe. Better I suppose would be a patch to detect a .clang_complete file in YCM directly...[1] https://gist.github.com/ZaneA/4719983