GtkExtra is a useful set of widgets for creating GUI's for the Xwindows system using GTK+. You can use it complementary to GTK+ and it is written in C. It is also Free Software and released under the LGPL license. The library includes the following widgets: * GtkSheet, a matrix widget * GtkPlot, a widget for drawing high quality scientific plots in two dimensions * GtkIconList, a GtkFixed subclass that allows you to display a table of xpm icons with editable labels * GtkDirTree, a GtkCTree subclass for navigating the file-system * GtkFileList, a GtkIconList subclass that displays the contents of a given directory using fancy icons for different types of files * GtkIconFileSelection, a nice looking file selection dialog * GtkItemEntryGtkItemEntry, a GtkEntry subclass * GtkFontCombo, a GtkToolBar subclass for selecting fonts * GtkComboBox, a composite widget with two buttons * GtkColorCombo, a GtkComboBox subclass for selecting colours * GtkBorderCombo, a GtkComboBox subclass for selecting border styles * GtkCheckItem, a check button with the look and feel of Redmond95