Over the past few years, the Greater Memphis GLBT Chamber of Commerce has amassed a pretty useful list of local gay-owned and gay-friendly businesses. Among them are Crye-Leike Realtors, First Tennessee Bank, and Frank Balton Sign Co. For a full list, arranged by type of business, check out their directory.
The chamber is currently seeking input for additions to the directory. If you know if a gay-friendly business that's not on the list, send your suggestion to email@example.com.
For a very comprehensive list of national gay-friendly companies, check out the Human Rights Campaign's 2009 Buyer's Guide.