Regina
Regina is a software package for low-dimensional topologists, with a focus on 3-manifold and 4-manifold triangulations, knots and links, normal surfaces, and angle structures.
Free software · regina-normal.github.io
Open Regina in AirStackWhat Regina’s own pages say
| What it says it does | Regina is a software package for low-dimensional topologists, with a focus on 3-manifold and 4-manifold triangulations, knots and links, normal surfaces, and angle structures. regina-normal.github.io |
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| Platforms | GNU/Linux, Mac, Windows, iPad regina-normal.github.io |
| Free plan | Yes regina-normal.github.io |
| Open source | Yes regina-normal.github.io |
| License | under the terms of the GNU General Public License regina-normal.github.io |
Each value is a quote AirStack found on the product’s own pages, read 2026-11-05. A missing field means AirStack has not found it on its pages.