The Guardian and Observer Style Guide has never capitalised internet. Includes heavy metal umlauts.
Ravelry: it’s all there. And if it isn’t, you can ask about it.
Techknitting: “35 years of tricks want out of my mind & into yours”: Simple or fiddly, pretty much every knitting technique can be found on Techknitter’s site, with diagrams.
Stitchmastery is the software I use to create charts for knitting patterns; most of my clients do too.
Woolsack has all the information on British wool and breeds.
Knittingfool.com is an online stitch dictionary, where you can search by the name of a stitch pattern or the number of stitches in a repeat, among others.