1)   CtrlView 3.20
CtrlView is a fast, compact, powerful viewer/converter for different 2D/3D raster/vector file formats with the format recognition system. It means that CtrlView analyses content of the file and defines its format.

 2)   HPGL Export for SolidWorks 1.0
HPGL Export for SolidWorks is a HPGL plot file export add-in for SolidWorks. This add-in gives SolidWorks the ability to export geometric data from SolidWorks drawings to HPGL Plot (PLT) files.

 3)   iNetBau PlotManager 4.0.4
PlotManager, PlotConverter and PlotViewer in one program!

 4)   Total CAD Printer 1.1
Total CAD Printer is a time saver due to its ability to automate printing tasks. It prints folders of DWG, DXF, PLT, PRN, SVG and other CAD drawings requiring min actions from you. Well-thought interface and command line support make it best deal.

 5)   Total CAD Converter 1.01
CAD Converter will help you to convert CAD files to tiff, PDF, jpeg, png, wmf, dxf. Source formats are dwg, dxf, plt, hgl, hg, hpg, plo, hp, hp1, hp2, hpgl, hpgl2, gl2, prn, spl, cgm, svg. CAD Converter also resizes files. All can be done in batch!

 6)   Amethyst PLT-2-DWG 2
Amethyst PLT-2-DWG is a powerful Windows program that enables you to quickly and easily batch convert PLT (HPGL/2) files to AutoCAD DWG and DXF. Support for all versions of AutoCAD from 9 to 2007. Stand-alone utility - AutoCAD is NOT required.