UltraSurf is a lightweight, portable executable that runs directly from a USB stick. It is technically a proxy, not a VPN, but it encrypts traffic and rotates IPs every few minutes.
While using portable torrent proxy websites, keep in mind: torrent proxy websites portable
Leo reached into his pocket and pulled out a nondescript silver thumb drive. This was his "survival kit." On it lived a —a version of qBittorrent that didn't need to be installed on the library’s computer. It was self-contained, leaving no trace in the Windows registry and carrying his entire library and settings wherever he plugged it in. UltraSurf is a lightweight, portable executable that runs
: Reliable indexer with high seeder counts for obscure files. This was his "survival kit
Content Based Monitoring of Complex Networks using Mobile Agents
: Sites hosted by volunteers to provide access in restricted regions.