mullvadvpn-app

KeeWeb can create password vaults or open KDBX databases produced by KeePass, KeePassXC, and compatible tools. It runs in a browser or as a desktop application on Linux, Windows, and macOS. Vaults may remain as local files or be stored through Dropbox, Google Drive, or OneDrive, and the web edition can be self-hosted for greater control over deployment.

ProxyBridge redirects traffic from proxy-unaware applications through HTTP or SOCKS5 proxies on Windows, macOS, and Linux, with per-process rules for proxying, direct connections, or blocking. Its GUI and CLI suit security testing, protocol analysis, and selective routing. The implementation uses platform-level interception, so supported OS versions, kernel features, and elevated permissions vary by system.

Zen runs a local system proxy on Windows, macOS, and Linux to block ads, tracking scripts, malware, and other unwanted requests from browsers, desktop applications, and operating-system components. Users can inspect blocked requests and the rule that matched, then use bundled filters or add hosts files and EasyList-style lists. The first run requires installing a root certificate generated locally so HTTPS traffic can be inspected. On Linux, automatic proxy configuration is currently limited to GNOME- and KDE-based desktops.

mhrv-rs runs a local HTTP and SOCKS5 proxy that forwards requests through a Google Apps Script deployed under your own account, concealing the destination from the ISP at the TLS SNI layer. Setup requires creating the relay, choosing an auth secret, installing a local certificate, and configuring the browser or system proxy. Google can still see destination sites, and Apps Script quotas or unsupported video CDNs can limit usage.