From Josh Jacob:
TNEF's Enough allows Macs to read and extract files from Microsoft TNEF stream files. The files are usually received via email from Microsoft Exchange and Microsoft Outlook users. You will usually receive an attachment named "winmail.dat." If someone has even sent you a message or file and all you have received is a "winmail.dat" file then you need TNEF's Enough to open it and extract the embedded file.
I don't need it too often, but it is important to have it there for when I do need it. It is a shame that companies (like Microsoft ) have to make proprietary programs that don't 'play' well with others
This review was originally posted on VersionTracker.com. easy to install, and worked really well. But that said, I did receive one file I couldn't translate, and I also had to quit the program, and try a few times for some of them. Still, a very useful little app.