Web: Vector images are great for things like logos that need to scale to any size, but software to make them is often expensive. Method Draw provides a wealth of vector tools for free, and it runs inside your browser.
Adobe Illustrator is the industry standard when it comes to vector creation, but it can be quite expensive and cumbersome to use. Method Draw provides many of the basic features for no cost. It probably won't replace the tools in a professional's arsenal, but it's incredibly handy for the occasional logo.