Description: PDFescape is a free online PDF editor that allows you to view, edit, annotate, fill forms, sign documents, and more with PDF files directly in your web browser. It offers basic PDF editing features for free.
Type: software
Pricing: Freemium
Description: Xcos is an open-source graphical programming tool for modeling and simulating dynamical systems, specifically designed for control systems modeling. It features block diagram modeling, simulation, data plotting, and embedded code generation.
Type: software
Pricing: Open Source