Adobe Illustrator Alternative: InkScape

InkScape is an Open Source vector graphics editor, with capabilities similar to Illustrator and CorelDraw using the W3C standard SVG file format. Inkscape supports many advanced SVG features (markers, clones, alpha blending, etc.) and it has a streamlined interface, which makes it very easy to edit nodes, perform complex path operations, trace bitmaps and much more. There is also an active user and developer community by using open, community-oriented development.