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puNES vs Nestopia (Richard Bannister): catalog facts
puNES	Nestopia (Richard Bannister)
Free Free to download, with source code published on GitHub.	Free Free download; the optional Emulator Enhancer add-on is shareware.
Windows, Linux	macOS
Wide NES mapper support Built-in player for NSF, NSF2 and NSFe music	Cycle-exact NES emulation for timing-sensitive games Supports 201 mappers and the Famicom Disk System
Described by the project as a work in progress No macOS build mentioned	Gamepad and full screen support require the paid Emulator Enhancer add-on macOS only
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
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 2, 2026

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