And the last third of the donations goes to...
Wikipedia (specifically, the Wikimedia Foundation).
The Wikimedia Foundation Inc. is a non-profit organization with the goal of providing free knowledge to every person in the world. Meeting this goal through the maintenance, development and distribution of free content, Wikimedia relies on public donations to run its wiki-based projects.
Wikimedia provides computing and network resources to create and distribute many reference works including Wikipedia, Wiktionary, Wikiquote, Wikibooks, Wikisource and the Wikimedia Commons. The content of these projects is provided to the public free of charge.
I decided to contribute to a single endeavor for the final third, instead of splitting the smaller amount among several others.
Giving money away turned out to be more fun than I thought it would!