Elixir - Dynamic, functional language designed for building scalable and maintainable applications
potrace - Open source program that transforms bitmaps into vector graphics.
Rust - A safe, concurrent, practical language
Autotracer.org - Free online image vectorizer
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
Vectorizer.io - Fast and easy way to vectorize an image online