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Avogadro vs wxMacMolPlt: catalog facts
Avogadro	wxMacMolPlt
Free Free and open source.	Free Free and open source under GPLv2.
Windows, macOS, Linux	Windows, macOS, Linux
Handles systems of thousands of atoms Force fields quickly clean up sketched structures	Graphical molecule builder Generates GAMESS input files
Assumes some chemistry background Not a full simulation package on its own	Built specifically around GAMESS Releases are infrequent
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
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.