[zomgwtfbekjam]

IMO you can find just about any tutorial on php related stuff out there.

However, you could do a tutorial about raw socket programming, eg how you can manually set flags such as RST, SYN, ACK etc. Build a port scanner from scratch that can do stealth, xmas, idle scans like nmap(of course it will never be as good as nmap, but it's just fun to learn new things). There's not many of those tutorials out there(if any), so it will definitely make you stand out from the crowd.

sure no problem. I was thinking more about projects like hacking tools and etc.

Port scanners are hacking tools as well. They are like digital crowbars to find listening services.