The STL is not that bad, cppreference (http://en.cppreference.com/w/) can be really helpful. Otherwise you can take a look at Boost (http://www.boost.org) if the STL is not enough for what you want to do.
And for the language itself, cprogramming (http://www.cprogramming.com) is a really good aid for the latest concepts like auto and decltype
I love the stl, it's almost always the best thing to use in C++ (wrt Cost/Benefit, love me some vectors). My comment was geared to someone who does "Java, C#, Ruby, Python, [and] JavaScript" programming. The most notable omissions in the c++ stl is GUI stuff, which comes standard in C# and Java.
As an aside, TDD and refactoring also aren't as mature in C++ (vs Java, C# and Javascript).
As an aside, TDD and refactoring also aren't as mature in C++ (vs Java, C# and Javascript).