This is a site that promotes the use of freeware as an alternative to illegal cracked software. It's a great resource with all kinds of audio software including plug-ins.

Very nice portal with loads of music-related software including VST and VSTi plug-ins but also Audio Players, DVD tools, Flash tools and a lot more.

This is a nice page, although a bit dated, with short desciptions and screenshots of many free VSTi plug-ins. The information is a bit old as several screenshots show an old version instead of the current one, but you still might pick up a few nice ones. Especially as everything is on one long page so it's very easy to browse.

Nice short introduction to Music Theory with an abundance of links to referenced material (after all, it's Wikipedia). For obvious reasons this is a great startingpoint for your own search to music theory information.

Very impressive database with in-deep information on EVERY aspect of music theory. The amount of information available is incredible. Just go there and then choose 'index' (second menu-row at the top of the page) and you know what I mean.