I am a strong advocate for the use of programming to formulate and check mathematical conjectures. The Python programming language is one of my favorites.
Python.org Python homePython tutorial A great place to start learning Python
My favorite flavor of Linux; available for free at archlinux.org.
Some things worth sharing:
- A list of mathematicians that were born or have died on this day.
- On Progress and Proof in Mathematics (William Thurston)