Bit-x
Image to PDF, PDF to image, HPGL2 to TIFF and others.....


RIP-x
Profesional Commandline conversion tool.
(Image to PDF,PDF to image, HPGL2 to TIF and others....)


BIT-View V2
Free viewer with support of HPGL2,RTL

Obsolete:

BIT-View V3
Multiformat viewer for PDF,TIF and HPGL2,RTL

PLT2TIF (please see Bit-X)
Easy to use HPGL2 to TIFF (or PDF/JPEG) file conversion tool.