A singleton implementation which uses static singletons so you only need to use get<type>()->...

singleton.cpp

#include <iostream>

template <typename T>
class singleton
{
private:
    static T* instance;

public:
    static T* get()
    {
        return (instance ? instance : (instance = new T()));
    }
};

template <typename T> T* singleton<T>::instance = 0;

template <typename T>
T* get()
{
    return singleton<T>::get();
}

class one
{
public:
    one()
    {
        std::cout << "one" << std::endl;
    }
};

class two
{
public:
    two()
    {
        std::cout << "two" << std::endl;
    }
};

int main(int argc, char* argv[])
{
    get<one>();
    get<two>();
    get<one>();

    return 0;
}