FreeCAD is an open-source parametric 3D modeler made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters.
Link discovery is the process of ascertaining information from directly connected networking devices, such as network switches. This can be helpful when diagnosing suspected network connectivity issues.
Send lets you upload and encrypt large files (up to 1GB) to share online. When you upload a file, Send creates a link to pass along to whoever you want. Each link created by Send will expire after 1 download or 24 hours, and all sent files will be automatically deleted from the Send server.