METAGRAF is a graphical editor for creating figures in MetaPost. It is currently able to draw any kind of figure in b/w or color. METAGRAF outputs a MetaPost file which can then be run through MetaPost by itself or using TeX. The program is written in Java and is thus platform-independent.
MpFot allows you to create MetaPost files from images in JPEG or GIF format. It uses Java2 and can optionally process the images before rendering to MetaPost files. MpFot can currently modify brilliance, color balance, and saturation, and it can also perform posterization, inversion of colors, and manual cropping. All the changes can be compared with the original image through a courtain-like facility.