Implementions of “Interior Point Method” to solve LP (and QP)

Question

I would like to look at a couple of implementations of IPMs. The languages preferable are C/C++, Java or any scripting languages like python, perl. Others are also fine.

I am searching for a good resource which can help me with,

1. basics of optimization techniques,
2. basics of Interior Point Method and its basics differences with the other techniques,
3. types of IPMs,
4. algorithmic details, and
5. sample implementations.

I am interested in this as part of my project where I would be using these ideas/logic to solve a sys of linear or quadratic equations.

Let me know if you have any info about the above resources.