OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network.
Firejail is a SUID program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces and seccomp-bpf. It allows a process and all its descendants to have their own private view of the globally shared kernel resources, such as the network stack, process table, mount table.