abandonware

noun

aban·​don·​ware ə-ˈban-dən-ˌwer 

computing

: software that is no longer sold or supported by its creator

… thousands of private collectors post source code online for so-called abandonware—games that no longer are published or supported by the companies that created them.

—Clay Risen

Word History

Etymology

abandon entry 1 + -ware (as in software)

First Known Use

2000, in the meaning defined above