Xfce4-screenshooter allows you to capture the entire screen, the active window or a selected region. You can set the delay that elapses before the screenshot is taken and the action that will be done with the screenshot: save it to a file, copy it to the clipboard, open it using another application or use your creativity with custom actions scripts.
Xfce4-screenshooter documentation
See NEWS for details on changes and fixes made in the current release.
Xfce4-screenshooter source code
Xfce4-screenshooter archive or Xfce4-screenshooter tags
From source code repository:
% cd xfce4-screenshooter
% ./autogen.sh
% make
% make install
From release tarball:
% tar xf xfce4-screenshooter-<version>.tar.bz2
% cd xfce4-screenshooter-<version>
% ./configure
% make
% make install
Visit the reporting bugs page to view currently open bug reports and instructions on reporting new bugs or submitting bugfixes.