Links to different resources that I've used in the past or generally find useful

Scala: An awesome object-functional language that runs on the JVM

PyDEC: A python module for Discrete Exterior Calculus.

Caltech Mesh Compendium: A nice little collection of meshes (.obj format)

Boost: Extremely useful collection of C++ libraries.

Qt: My GUI library of choice

Trimesh2: Simple but effective mesh classes/tools

CGAL: Comprehensive computational geometry library (C++)

OpenMesh: Excellent mesh processing library and mesh data structures (C++)

CMake: Do yourself a favor, use this build system

CMake wiki: Useful notes and tools related to CMake

Discrete Differential Geometry: {Sigrapph,Siggraph Asia} course notes