Here’s my list of top 7 free CAD programs and online tools every CAD user should know. Convert, edit, import and adapt your CAD models.
Source: 7 Must-Have Free CAD Programs and Online Tools – Bricsys CAD Blog
As a tool for modeling and making architectural design concepts Blender has a lot to offer with the built-in options, but we can always expand it with the use of Add-ons. Some of the Add-ons for Blender will come pre-installed with the software, and you don’t have to make any additional downloads, and you should …
Source: Blender 2.8 CAD like features: TinyCAD • Blender 3D Architect
Explore the open source alternatives to Adobe Acrobat for reading, creating, and editing PDF files.
Source: Open source PDF readers, creators, and editors | Opensource.com