Develop a Mac Application for Remote Desktop

I need simple program connect to PC and Mac each other (Same as Teamviewer, Ammy etc.) The scenario is: customer calling to representative --> install software and then representative connecting the PC or MAC. The most important things; -easy install -user friendly -free for users -include our logo -working PC's and MAC's The project is MVP stage right now. If we are accept your offers, will be start 10 days. Thank you for interest. (Our budget is limited)