Free Apps with 'Isolation' feature

Shelter is a Free and Open-Source (FOSS) app that leverages the “Work Profile” feature of Android to provide an isolated space that you can install or clone apps into.

Sandbox environment to clone selected apps and isolate them from accessing your personal data.

Sandbox environment to clone selected apps and isolate them from accessing your personal data (fork of Island with closed source parts removed).

Firejail is a SUID security sandbox program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces and seccomp-bpf.

Elegantly solve the problem of bad apps abusing storage permissions.

Windows portable app maker: launcher(s), runtime, and gui designed to help you run non-portable applications in a portable manner.

A small command-line utility providing Tor network isolation for third-party applications using Linux namespaces. Built on Arti, and onionmasq, oniux drop-ships any Linux program into its own network namespace to route it through Tor and strips away the potential for data leaks.