Meshroom

The resulting mesh is quite dense using a default template (a bit too much sometimes as the points are quite noisy and you need to downsample it afterwards) and it can manage quite a few images.

Cannot use without CUDA however.

Requires CUDA, doesn't work on AMD GPUs

I love this program but there are a couple issues that make is very aggrevating to use sometimes. You cannot do multiple instances without the chance of the program freezing up and you'll not be able to recover where it left off (it will start where it stopped, but will not progress). The cache files are very cluttered and unorganized. And the performance is far from ideal. However, it's the best free alternative out there, and if you don't use it every single day of your natural life, you will find this software comes in handy.

[Edited by scottchiste, September 24]

Node based, Open Source and easy to use 3D Reconstruction Software.

Easy to use photogrammetry tool.