Welcome to
Photopea
Photopea is photoshop-like graphic editor online! Has similiar UI like photoshop and a lot of mutual functions! You can draw, edit and even can open GIMP files.
The Cyber Vanguard - Button collection
This website has over 3000 88x31 animated buttons that you can save and put on your website.
Melps - Graphics collection
There's a few dividers, buttons, stamps and gifs, that you can use on your website.