Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
VOGSY - Professional service automation tool built on Google G Suite
FreeCAD - An open-source parametric 3D modeler
Office Timesheets - Professional Services Automation
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming