I created a tekkit server through hamachi, (I had it port-forwarded, but for some reason it stopped working), you can play tekkit through technic launcher which can be downloaded here : technicpack.net/ (you need minecraft for it, and it won't work for cracked minecraft), it is basically an advanced minecraft, you can make stuff like computers, robots, you have oil which you can transport through pipes, you have a whole lot more.
Add me on skype if you want to pla