Compare software

Oculante vs CactusViewer: catalog facts
Oculante	CactusViewer
Free Free open-source software.	Free Free and open source under the BSD 2-Clause licence; donations are welcome.
Windows, macOS, Linux	Windows
Fast viewer built in Rust Wide image format support	Single executable with no installer needed GPU rendering through a custom Direct3D 11 renderer
Project is in maintenance mode Editing features are basic	Windows only No packaged releases on the GitHub repository
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: BSD-2-Clause
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.