Xfig is an open source vector graphics editor which runs under the X Window System on most UNIX-compatible platforms.

In xfig, figures may be drawn using objects such as circles, boxes, lines, spline curves, text, etc. It is also possible to import images in formats such as GIF, JPEG, EPSF (PostScript), etc. Those objects can be created, deleted, moved or modified. Attributes such as colors or line styles can be selected in various ways. For text, 35 fonts are available.

Xfig saves figures in its native text-only Fig format, but they may be converted into various formats such as PostScript, GIF, JPEG, HP-GL, etc. xfig has facility to print figures to a PostScript printer, too.