BRL-CAD is a powerful open source cross-platform solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, a system performance analysis benchmark suite, geometry libraries for application developers, and more than 30 years of active development.
*Text from BRL-CAD homepage*
FreeCAD is an open-source parametric 3D modeler made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters.
*Text from FreeCAD homepage*
LibreCAD is a free Open Source CAD application for Windows, Apple and Linux. Support and documentation are free from our large, dedicated community of users, contributors and developers.
*Text from LibreCAD*
OpenSCAD is software for creating solid 3D CAD objects.
It is free software and available for Linux/UNIX, MS Windows and Mac OS X.
*Text from OpenSCAD homepage*
Open Cascade is a software development company which is focused on digital transformation of industries through the use of 3D technologies.
*Text from [Wikipedia](https://en.wikipedia.org/wiki/KeePassXC).*
7-Zip is free software with open source. The most of the code is under the GNU LGPL license. Some parts of the code are under the BSD 3-clause License. Also there is unRAR license restriction for some parts of the code. Read 7-Zip License information.
*Text from 7zip homepage*
## Other - This is for alternatives, that while work, aren't full replacements.