Individual Ready Icons
You can buy individual icons to suit your needs. Each icon is $5 when purchased individually.
Icon Usage Agreement
Vista Toolbar Icons will give a variety to your GUI replacing the standard icons with fine-looking stock icons in Vista style. The icons have bright colors and smooth edges.
Security Software Icons is a library of professionally-crafted ready icons for use in business and private products, including software, websites and desktops. The icons present a bright color palette, smooth and well-rounded edges.
Business Icon Set is a library of fine-looking ready-made icons for use in software and on websites. They are delivered in a variety of formats, sizes and color schemes.

Icons for medicine and chemistry: ambulance car, snake cup, pill, tablet, tooth, phial, syringe, test-tube, skull, bones, molecules and others.
Medical Icons for Vista has been created to eliminate any misunderstanding appearing while looking at a medical webpage or using a medical program. The images are available in numerous sizes and formats.