Easily create beautiful UML Diagrams from simple textual description. There are also numerous kind of available diagrams. It's also possible to export images in PNG, LaTeX, EPS, SVG.
Grayscale is a free Bootstrap theme with a dark color scheme, smooth scrolling page animations, and a collapsing top navigation bar. It works great for portfolios, businesses, and more!
G. Biegel, and V. Cahill. Proceedings of the Second IEEE International Conference on Pervasive Computing and Communications (PerCom'04), page 361--. Washington, DC, USA, IEEE Computer Society, (2004)