This is a development release of PLplot. It represents the ongoing efforts of the community to improve the PLplot plotting package which is almost entirely licensed under the LGPL. Development releases in the 5.9.x series will be available every few months. The next stable release will be 5.10.0.
PLplot releases may be found at http://sourceforge.net/projects/plplot/files/plplot.
Release notes and a detailed ChangeLog are given in the README.release and ChangeLog.release files included with the release tarball. (The README.release file available separately at http://sourceforge.net/projects/plplot/files/plplot/ for each release is a concatanation of those two files.) Feedback and contributions for PLplot can be submitted to the mailing lists provided at http://sourceforge.net/p/plplot/mailman/.
PLplot's Home Page is http://plplot.sourceforge.net/.