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puNES vs Nestopia UE: catalog facts
puNES	Nestopia UE
Free Free to download, with source code published on GitHub.	Free Free and open source under the GPL.
Windows, Linux	Windows
Wide NES mapper support Built-in player for NSF, NSF2 and NSFe music	Based on the well-known Nestopia core Includes a game database and palettes
Described by the project as a work in progress No macOS build mentioned	This repository covers only the legacy Win32 build New GUI development has moved to the Jolly Good Emulation project
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.