Vectors are great time-savers for designers, and there are many sites offering free vectors, as well as art sites such as deviantART. This is a good thing, but then creates the problem of searching through hundreds of vectors to find exactly what you want. That's where this list will hopefully come in very useful for designers to increase their vector library.
Vectors are created in vector drawing software such as Adobe Illustrator, and are usually supplied as .ai (Adobe Illustrator) and/or .eps (Encapsulated PostScript) files. The advantage of using vector graphics in design is the scalability without losing quality.
Just in case you don't find the vector you are looking for in this list, I have included a list of free vector sites after the showcase.