I used github for a variety of HPC and education related repositories and works in progress. Here is a selection of some of the projects that I work on every so often.

Applications
Karaaage HPC Cluster Management
Recluse: Red Hat(ish) Cluster Setup
Slurm Job Script Generator
PyChopper: Full length cDNA reads

Courses
Hadrien Gourlé's Bioinformatics Tutorials
Spartan HPC Website Documents
Introduction to Linux and High Performance Computing
Advanced Linux and Shell Scripting for HPC course
HPC course for Orygen Researchers
HPC course for Economics
Parallel Programming Course
HPC Certification Programme

Books
A Traveller's Dictionary in Tetun-English and English-Tetun
Supercomputing with Linux. Also available on Smashwords.
Sequential and Parallel Programming with C and Fortran. Also available on Smashwords.
Mathematical Applications and Programming
Teaching Research Computing to Advanced Learners
Information Systems Infrastructure
Software Tools for eResearchers
Quality Assurance in Technical Organisations
A History of the Victorian Partnership for Advanced Computing
Building Clusters and Clouds
Technical Project Management