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HubSpot is an AI-powered customer platform with all the software, integrations, and resources you need to connect your marketing, sales, and customer service. HubSpot's connected platform enables you to grow your business faster by focusing on what matters most: your customers.
SteamCAD2 is a full featured 2D CAD for precise drawing with emphasis on artistic like output. It can export the drawings to variety of formats such as pdf, eps, svg, png and others. The source code contains user guide in pdf format (SteamCAD2.pdf). The software is available both for Linux and Windows systems.
PythonCAD is a CAD package written, surprisingly enough, in Python using the PySide2 interface and python3. The PythonCAD project aims to produce a scriptable, open-source, easy to use CAD package (Cross Platforms)
K3Studio is the universal workbench for 2d/3d modeling, visualization and simulation.
The main topic is simulation and visualization of automata networks, but it can be used for diagram drawing, flowcharting, presentation, as a CAD, GIS,...