This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
If you mean to start an application on the server side, that is certainly possible with Runtime exec methods. A servlet can't do anything about starting an application on the client side. Where is this application and what does it do? Bill