No longer will you be faced with a situation where you have a file on hand but don’t know which application you need to open it.
Free Opener is a freeware portable tool that opens over 75 file types on Windows operating system, including:
DOC, AVI, DOCX, ZIP, JAR, RAR, PDF, XML, HTML, SWF, 7Z, PHP, XLSX, MKV, FLV, XLS, JPEG, RAW, TXT, PSD, WMV, CR2, CRW, GIF, MSG, NEF, TIFF, JPG, MOV, MP4, LOG, PNG, CSS, MP3, CFG, HTM, BMP, JS, XLSM, WA, ICO, REG, DNG, ARW, MID, ORF, RAF, PEF, RESX, CF2, ERF, MEF, MRW, SR2, X3F, CSV, CS, INI, MPEG, MPG, etc.
This tool will especially find use on those computers which do not have Microsoft Office installed. You will now be able to easily view Office doc, excel and other files.
Do note that the program will install various codecs, components, and .NET Framework without asking, so as to be able to function properly.
Download: Free Opener.
You may also want to check out Universal Viewer.

