Web Chat Program Software - Like BoldChat or LivePerson

AI am looking for a Russian or Eastern Europe code to create an Online Chat Support download/executable. Which ever language you think is best, like C, C++, etc... This program allows the members to talk on one on with website visitors who choose to chat with them for online support. There are 3 pictures attached. Similiar programs like this exist like Liveperson, BoldChat, etc.., but we will offer multiple ways of chatting, like ajax in-screen popup for top and bottom right corners, new window, top right corner. Also need to make sure the program always checks for latest updates from us, checking my server for that.