OpenSCAD is a software for creating solid 3D CAD objects. It is free software and available for Linux/UNIX, MS Windows and Apples OS X. Unlike most free software for creating 3D models (such as the famous application Blender) it does not focus on the artistic aspects of 3D modelling but instead on the CAD aspects. Thus it might be the application you are looking for when you are planning to create 3D models of machine parts but pretty sure is not what you are looking for when you are more interested in creating computer-animated movies. OpenSCAD is not an interactive modeller. Instead it is something like a 3D-compiler that reads in a script file that describes the object and renders the 3D model from this script file (see examples below). This gives you (the designer) full control over the modelling process and enables you to easily change any step in the modelling process or make designes that are defined by configurable parameters.

Purity is a Python library for Pure Data dynamic patching. The idea is to be able to harness the power of Pure Data for audio programming without having to use its graphical interface. Python's clear and intuitive syntax can be used with profit in order to create intricate patches with advanced string handling, graphical user interfaces and asynchronous network operations. Purity uses Twisted, an event-driven Python framework.

bpython is a fancy interface to the Python interpreter for Unix-like operating systems

Elpoint is a presentation tool which runs on Emacs.

The instantreality-framework is a high-performance Mixed Reality (MR) system, which combines various components to provide a single and consistent interface for AR/VR developers. Those components have been developed at the Fraunhofer IGD and ZGDV in close cooperation with the industry.

Datahub is a tool that allows faster download/crawl, parse, load, and visualize of data. It achieves this by allowing you to divide each step into its own work folders. In each work folder you get a sample files that you can start coding.

HarvestMan is a modular, extensible and flexible web crawler program cum framework written in pure Python. HarvestMan can be used to download files from websites according to a number of customized rules and constraints. It can be used to find information from websites matching keywords or regular expressions.

A good overview of the problem of embedding dynamic features in the C++ language and a proposal for a solution.