PHP Software libraries for graphs

=PHP open source graphs libraries=
 * graPHPite - no active development - last release in 2005.
 * Open Flash Chart - Needs flash - last release 2009
 * pChart - Active development - available under GPL
 * Google Chart Tools - Requires remote js includes, free to use.

Know more? Please add it!

=Be inspirated by commercial services=
 * Wufoo
 * Apple Numbers
 * ManyEyes