Resources

It's going to be difficult to create a comprehensive list of resources but to begin with, I'll list some really good starting points.
If you know of more, please email me...

Sermon Index Free sermons for download. Passionate, sometimes arminian, but they do have Paul Washer! (and the "Revival Hymn") - they aim to promote Biblical revival.
Sermon Audio Loads of free sermons; John Piper, John Macarthur, Paul Washer, everyone! (just about).
Christian Audio An average site where most of the audio you pay for but every month they have a free audio book download (I've got an audio New Testament (Paraphrase but still), Calvin on prayer, All of Grace by Spurgeon, Fifty Reasons Why Jesus Came to Die by John Piper (and many others).
Desiring God John Piper's ministry, myriads of mp3s, videos and ebooks and whatever other resource strikes your fancy. (You should check out his renowned mp3 biography series "Men of Whom the World is Not Worthy" at http://www.desiringgod.org/ResourceLibrary/Biographies/ and his ebooks at http://www.desiringgod.org/ResourceLibrary/OnlineBooks/ByTitle/).
Grace to You John Macarthur's ministry, all his sermons were also released for free download a few months ago.
Monergism Just tons of resources about doctrine and evangelism and everything. (They also have piles of audio files - sermons and lectures). They'll point you to masses of public domain ebooks (mostly pdf) but also have a vast index of mp3s on pretty much any conceivable subject.
Christian Classic Ethereal Library Loads of text resources, all of Calvin's commentries, John Owen, Jonathan Edwards, you name it!
Resound Worship A group of British based worship songwriters, seeking to resource the church with heartfelt, crafted, accessible worship songs. The group meets on a regular basis to critique each other’s songs, and the conversations continue through a web forum, where we post and refine material. Once they have been through this process, and the songs have been tested on our home churches, we send the lyrics to an external theological critique group. Best of all, they give pretty good quality free mp3 downloads of their songs.
Church History at churchaudio.org.uk Pastor Elliott's 97 Church History Lessons as recommended by nn0535 - Thanks!
The Verity Project Verity is free and open source Bible software for Linux and Windows (and they want a Mac version too so if you know how to compile Qt for Mac, get in contact!)

Website by James Cuénod for the Glory of God