[jsrn]

Does software count as an 'item' for you? If yes, for me (and I guess many others here) it would be various products of JetBrains, also Kotlin (even if I did not pay for that one directly) and OCR software from Abbyy. Also did not pay for, but use daily: nginx.

[Tade0]

JetBrains are Czech, not Russian.

[projektir]

IIRC they're headquartered in CZ, but the developers were mostly in St. Petersburg, and Kotlin is named after a Russian military island.