NetX is a high-quality JNLP client that executes network-based applications.
NetX downloads code over the network, caches it, and runs it in a secure sandbox environment (unless signed).
Features of NetX:

- Modular: Easily add JNLP capabilities to an application.
- Small Size: Loads from a ~130K JAR file.
- Saves Memory: Launch programs in a shared JVM.
- Fast startup: Runs applications from a cache for fast starting.
- Security: Run any application in a sandbox or log its activities.
- Auto-Update: Applications can auto-update without special code.
- Network Deployment: Deploy to the internet, not with installers.
- Open Source: GNU Lesser General Public License.