ViewCompanion Standard - description from Softdepia.com:
ViewCompanion is a powerful application for viewing and printing HPGL and HPGL/2 files generated by your CAD program or plotter driver. The HP-RTL format is also supported, so HPGL/2 files with embedded pictures will be shown correctly. ViewCompanion can convert the viewed hpgl file to many other standard formats. The following formats are currently supported: Adobe Postscript_, Adobe PDF, AutoDesk DWF, AutoDesk DXF, CALS Group 4 Raster, Computer Graphics Metafile (CGM), Gerber RS-274X, JPEG Raster, Paintbrush PCX (PCX), Portable Network Graphics (PNG), TIFF Raster, Windows Bitmap (BMP), Windows Enhanced Metafile (EMF), Windows Metafile (WMF)
Both Autodesk Drawing Web Format (DWF) and Adobe PDF are very useful and popular formats for distributing drawings on the Internet. You can use ViewCompanion to convert any HPGL file to AutoDesk DXF format which you can read in any major CAD application, eg: Autodesk AutoCAD.
ViewCompanion gives you advanced functions for zooming and panning, so that you can view your plot files fast and accurate, before actually plotting them. ViewCompanion also supports Microsoft's new IntelliMouse for zooming and panning operations. The ViewCompanion Pro version also allows you to add markups to the loaded file. Among the supported markup elements you will find rectangles, ellipses, polygons, text, arrows and images.
Batch printing and conversion functionality is integrated into the ViewCompanion.
ViewCompanion Key Features:
View and print HPGL and HPGL/2 files.
Microsoft IntelliMouse support for zooming and panning.
ViewCompanion supports Metric and Imperial coordinates.
Multiple Document Interface (MDI) makes it easy to view several files at once.
Drag and Drop supported. Both single and multiple files.
Full screen mode.
Add footer/header containing date, scale, time and filename when printing.
Color or Black & White Printing.
Scaled print or fit to paper.
Poster mode for printing big format drawings on eg. Multiple A4 pages.
Send HPGL file directly to Printer as is (unchanged).
Rasterize to TIFF, PNG, JPEG etc.
Batch Printing and Conversion (HPGL, DWF, DXF, CGM, PCX, PNG, TIFF, BMP, EMF, WMF).
Define user Pen Table full control of colors, styles and widths. Also supported for batch printing and conversion.
Supports multipage HPGL/2 files.
Supports embedded (RTL) raster.
ViewCompanion Standard is a "Free to try" program. You can download and try it for an evaluation period.