Illustrator provides the following painting tools:

The Paintbrush tool (B) draws freehand and calligraphic lines, as well as art and patterns on paths.	The Mesh tool (U) creates and edits meshes and mesh envelopes.	The Gradient tool (G) adjusts the beginning and ending points and angle of gradients within objects.	The Eyedropper tool (I) samples and applies color, type, and appearance attributes, including effects, from objects.
The Live Paint Bucket tool (K) paints faces and edges of Live Paint groups with the current paint attributes.	The Live Paint Selection tool selects faces and edges within Live Paint groups.	The Measure tool measures the distance between two points.