I remember a web page called the Netbook of Feats that had a huge list of feats for 3.5e. Does anyone know where that went?
The latest edition of the Netbook of Feats that I can find is Version 12.4, published in May 2007. The official site is down, but you can download the HTML version here:
Take care when using the Netbook of Feats, as not all of these feats are balanced to the same standards as the official material. I once had a character take the feat Bonded Weapon from this netbook, which grants +2 to attack and +1 to damage with one individual weapon, at the cost of -2 when using other weapons. As a high-level fighter specialized in one weapon, Lord Aramil never wielded anything but his own named weapon, and so this feat was very powerful.
We'd always made some effort to balance the feats but it's a tricky business in 3.5 with so many options and ways to combine things. I think any time you venture outside the core rules for a game you want to be a little self limiting so you keep the game fun for the style of play you are doing.