Do It Yourself Flying in D&D excel file : I wrote an article on DIY flying featured in Roleplaying Tips. With this spreadsheet you can find out exactly how high you can go, and how far you can see, now matter what level or spell you are using.

DMGR2: The Castle Guide Conversion : Wizards was so kind as to create a section on their site with free historical materials, including the lovely Castle Guide. Alas, it came text-only. So, pursuant to their FAQ, I converted it to 3E and here it is, as close as possible to the original look and feel, a geniune TSR circa 1990 vintage product.