Ask HN: Where can I find volunteer opporuntunities for IT or development work?

You've seen ancient nonprofit technology systems, and you've seen nonprofits struggling to achieve their goals because their missing the IT expertise they need. I moved to Seattle around a year ago for a job.

Is there an active volunteer opportunity listing site, or one geared especially towards IT/tech-type work?

If anyone knows of local Seattle clearing house volunteer organizations or open opportunities, feel free to share too.