Meenakshi,
To the best of my knowledge, it is not possible to install any such applications without the knowledge of the connected computer. Even for cookies, some of the latest and advanced computers give warning about any new installations.
Furthermore, it will amount to spying or you might even be branded among the spywares, if you try to install any application without the consent of the clients, who visit your site.
The best way I recommend you is, to take prior approval from each client who land on your site, by simply displaying the details of application and its usage, then to go ahead with your plan.
Here too, most often, majority of the net surfers reject outright any new installations. If done without surfers knowledge, it can be tracked to the source that might complicate your plans in future.
Best wishes,
TRS Iyengar
www.trsiyengar.com