Old SCO --> Tarantella, now owned by Sun.

SCO originally Sold the SCO Product to Caldera and rebranded itself as Tarantella around a new product for Application Delivery which was Citrix like but for Unix Platforms, they purchased another product from New Moon to Cover the Windows side of the equation. They branded the products as Secure Desktop for Unix and Secure Desktop Terminal Server Edition, Caldera later rebranded itself as SCO.

Tarentella was later bought by Sun and the New Moon Product (Secure Desktop - Terminal Server Edition) was licensed to ProPalms, some staff transferred with the Licensing. Propalms still sell the product as ProPalms TSE. Sun rebranded the Unix version as Sun Secure Global Desktop.