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puNES vs BizHawk: catalog facts
puNES	BizHawk
Free Free to download, with source code published on GitHub.	Free Free and open source under the MIT licence.
Windows, Linux	Windows, Linux
Wide NES mapper support Built-in player for NSF, NSF2 and NSFe music	Frame stepping, rewinding and unlimited named savestates across every core Memory view, search and edit in all emulated hardware components
Described by the project as a work in progress No macOS build mentioned	Windows users must run a separate prerequisites installer first Windows and Linux only; macOS is not officially supported
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
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 September 21, 2026

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