Here are few grunge abstract clots of lines. They was traced from photoshop brushes shared by FreeGrunge.com. They can be used to add some grunge style inside you design or to created a texture for you background. Grunge is a nasty and dirty style in design, but it is popular trend. Even few elements of grunge can accent an idea of your design.
Vector images can be opened in different drawing program, for example: PMView, Flash, Xara, Photo Styler, Corel Draw, and surely Any Adobe Software Illustrator, Photoshop, Indesign etc. can be used to open and edit vectors. As for me, I prefer yo use Adobe Illustrator!