def get_stdlib_modules():
    """
    Returns a list containing the names of all the modules available in the
    standard library.
    
    Based on the function get_root_modules from the IPython project.
    Present in IPython.core.completerlib in v0.13.1
    
    Copyright (C) 2010-2011 The IPython Development Team.
    Distributed under the terms of the BSD License.
    """
    modules = list(sys.builtin_module_names)
    for path in sys.path[1:]:
        if 'site-packages' not in path:
            modules += module_list(path)
    
    modules = set(modules)
    if '__init__' in modules:
        modules.remove('__init__')
    modules = list(modules)
    return modules