My personal favourite is the online Organic Gardening Catalogue (http://www.organiccatalog.com/catalog/index.php?cPath=21_52)

eBay is also great for getting hold of gardening equipment reasonably cheaply (bearing in mind that postage costs vary from seller to seller!).

Does anyone use online suppliers to purchase seeds / plants and gardening equipment? If so, this is the place to recommend your favourites!

My parents have used www.kenmuir.co.uk numerous times, and if you order fruit trees from them, they come with a laminated instruction sheet :)