I want to create like a online interaction system on my site. you know like a "Chat to us now" kinda thing. Where when a user is on your site you can chat with them directly from the home page or any other page using a 3rd party software like Pidgin, but the user uses the site to reply. I found some awesome 3rd party plugins to use, but you have to pay like per month on all of them, and i can't afford that right now.
now i found a free one to use, but has loads of limitations, its called Olark. It works perfectly, but like i said, you have limitations.
I want to create my own, im just not sure what to look for, does anybody have an idea where i can look for like tutorials on how or some open source thing i can look into.