A quick reference guide for basic (and more advanced) natural language processing tasks in Python, using mostly nltk (the Natural Language Toolkit package), including POS tagging, lemmatizing, sentence parsing and text classification.
QCAD is a free, open source application for computer aided drafting (CAD) in two dimensions (2D). With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schematics and diagrams. QCAD works on Windows, macOS and Linux. QCAD Professional is the paid version that includes additional advanced drawing tools and supports more file types, most notably AutoCAD dwg and MicroStation dgn files.