Etecad File Manager (EFM) is a Windows CAD graphics file manager and viewer rolled in one. It is a front end tool to AutoCad as well as allowing use of AutoCad files without having/using AutoCad.
Etecad has an impactful CAD and graphic image organizer and viewer: Etecad File Manager (EFM). EFM was designed to be a CAD graphics file manager and viewer rolled in one.
Etecad File Manager (EFM) Features:
1. Locate, retrieve, view, and plot files quickly
2. Attach descriptions to files and directories for easy identification and enhanced search ability
3. Share a variety of file formats with non-CAD users
4. Convert DWF to DWG formats; PLT to DXF format
5. Convert DWG and PLT to PDF and DWF formats
6. Support AutoCAD 2010
7. Support Line Merge for any single page PDF file

Etecad File Manager (EFM) supports the following formats: DWG, DXF, PLT, HPGL/2, PDF, DWF, BMP, CALS, ECW, EMF, DC5, EPS, ICO, WMF, JPG, GIF, PCX, TARGA, TIFF, PNG, HTML, RTL, SVG, CGM, DOC, TXT, SLD, SLB, XLS, and RTF.

Etecad File Manager (EFM) installs easily, loads fast, and is optimized for high-efficiency work with AutoCAD/IntelliCAD. EFM creates order out of chaos, helps you organize your work, and saves you time and money.

1. EFM Professional: ($149)
The complete set of EFM utilities: EFM Quick View + PLT Viewer and batch converter + DWG Viewer and converter

2. EFM LT/DWG: ($99)
EFM Quick View + DWG Viewer

3. EFM LT/PLT: ($89)
EFM Quick View + PLT Viewer and batch converter

4. EFM Quick View ($69):
The most economical EFM. This is an especially good choice if you already own any commercial stand-alone PLT and DWG viewers.

5. InstaSlide: ($20)
An software that allows quick and simple screen capturing, creation of slide presentations (now included with the EFM Suite)

6. Autocad Slide Manager: ($35)
Windows Explorer Style software for managing AutoCAD Slide Files/Libraries (now included with the EFM Suite)

All prices include one year of free maintenance and technical support provided by e-mail.

The license of this software is Free Trial Software, the price is $149.00, you can free download and get a free trial.