Free online language courses
When you're bored at work (or at home), why not learn a language or two in your spare time? The BBC has a (non-English) languages section, concentrating mainly on British and major European languages (Scottish Gaelic, Irish, Welsh, French, Italian, German, Spanish). For intermediate learners, the BBC also produces an audio newsmagazine for each of the latter four languages. If you're an ultra-patriotic American or just want to watch some TV in a random language, the Voice of America also broadcasts in 44 languages.
Another cool resource is the Wikibooks Languages Bookshelf, which includes resources (of wildly varying detail and quality) on many, many languages (Arabic, Japanese, Classical Greek, Dutch, Cantonese, etc.). The thing about wikis is that they grow only through the contributions of random volunteers, so some languages inevitably have more volunteers than others. In my existential boredom, I've been contributing in small ways to Wikipedia, and I'm thinking of adding to some of the Wikibooks here as well. I encourage anyone reading this who has any knowledge of a language other than English to do the same. If you make mistakes, someone else can always correct them later. And in a lot of cases, there is so little there that any good-faith addition can only benefit the project.
Another cool resource is the Wikibooks Languages Bookshelf, which includes resources (of wildly varying detail and quality) on many, many languages (Arabic, Japanese, Classical Greek, Dutch, Cantonese, etc.). The thing about wikis is that they grow only through the contributions of random volunteers, so some languages inevitably have more volunteers than others. In my existential boredom, I've been contributing in small ways to Wikipedia, and I'm thinking of adding to some of the Wikibooks here as well. I encourage anyone reading this who has any knowledge of a language other than English to do the same. If you make mistakes, someone else can always correct them later. And in a lot of cases, there is so little there that any good-faith addition can only benefit the project.