Samsung DeX -
Transforms Samsung Galaxy smartphones into a desktop-like setup with ad-free operation, wireless screen mirroring, docking station support, dedicated DeX modes for tablets, multiple monitor use, and USB, HDMI, Ethernet connections.
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Thunderbird -
Cross-platform email client supporting multiple identities, chat, and strong filtering. Extend functionality with add-ons like RSS/Atom feed readers and PGP support.