Pen Tablet

if you do any kind of drawing, or image editing, then pen tablet is necessary. Far better than mouse.

Wacom Intuos pen tablet

this one, fairly standard, can be used as a touch pad, and battery-free.

• Have fun with photos and art with included downloadable creative software - Autodesk Sketchbook Express and ArtRage Studio
• Replaces your mouse and turns your computer into a digital drawing canvas
• Battery-free, pressure sensitive pen and digital eraser helps you to draw thicker and thinner lines depending on how hard you push on the pen
• Use your fingers to navigate, scroll, zoom your artwork with multi-touch gestures
• Four customizable ExpressKeys that put your favorite shortcuts like undo or copy/paste at your fingertips
• Connects to Mac or PC and works with any software program
• Small Compact size, 8.3-by-7.0 inches, is perfect for limited desktop areas and can be setup for both left and right handed use
• Work cord-free with Wireless accessory kit sold separately