DiaCanvas is a generalized version of the drawing canvas used by DIA. It extends some features used by DIA and adds new ones, while preserving as many of the original features as possible. This project is no longer actively maintained. It is suggested that you try DiaCanvas2 instead.
DinX (DinX is not X) is an experimental windowing system that performs clipping and drawing inside Linux kernel modules. This eliminates much context-switching between clients and the server, and makes the code small, simple and fast. It is aimed at small systems like Linux handhelds.
Drawtool is an application that reads in simple vector geometry from stdin and displays it in a gtk window. Similarly, it will write data onto stdout as generated by click-drag mouse movements. It can be used to prototype graphical ideas quickly, provide a networked whiteboard or draw pretty patterns with minimal effort.
Evas is a canvas library, designed to work with the X Window System. It is designed to be able to take advantage of any graphics hardware or CPU processing power you may have, or to adjust for the lack of it. It has a simplistic API to access the features of a canvas to aid in making development using Evas easy.