At the moment NeSSi² is not actively maintained anymore since we are planning a successor project.
NeSSi² is a network simulation tool suite addressing in particular network security aspects. Sample capabilities are profile-based attack generation, traffic analysis and support for attack/malware detection algorithm plugins.
Simulation of historical and contemporary launch vehicles
ORT is a tool for modelling and flying launch vehicles of arbitrary size and complexity. Unlike OpenRocket, it does not focus on amateur rockets but on real-world launch vehicles.
The bundle includes a graphical design tool with an integrated simulation engine for rocket launches. Also included in the bundle is a playback application and a headless driver for logging simulations into spreadsheets.
ORT integrates JME3 for 3D rendering.