Here are some useful references for loan servicing professionals, mortgage investors, and other lending practitioners:

Software

Z-Law, a primary reseller of software and materials for the real estate, mortgage, financial, and legal marketplaces.

Newsletters

NoteWorthy, a newsletter with useful articles monthly for note brokers and investors of various cash flows. An excellent two part article on late fees can be found here plus one on protecting your data.

The Paper Source, a monthly newsletter for mortgage investors and note brokers, especially for discount mortgages. Check out the UCC and 1098 articles. Recent articles include usury, simultaneous closings, and late breaking news about the private mortgage industry.

SourceMedia, formerly known as Faulkner & Gray, is a publisher of various newsletters for mortgage brokers and bankers.

Web sites

IRS, where you can download tax forms and read relatively simple explanations of tax regulations in layman's language as they apply to loan servicing, mortgages, real estate, and other investments. Be sure to note the taxpayer friendliness of the site.

Housing and Urban Development (HUD), has excellent reference loan, mortgage, and real estate material in plain English.

Federal National Mortgage Association (FNMA or Fannie Mae), primarily for mortgage professionals and loan originators.

Government National Mortgage Association (GNMA or Ginnie Mae), primarily for mortgage professionals and loan originators.

Winning the Cash Flow War, the name of a book by Fred Rewey and the author's web site. Published by John Wiley & Sons, the book is ideal for those who want to start accumulating assets, especially younger people just starting their careers. The information is outstanding, makes a great gift, and you cannot beat the price.

Discussion groups

Creative Real Estate Online, includes a Cash Flow Forum for real estate investors and mortgage loan originators.

The Notes Lounge, a forum for note and mortgage investors and cash flow brokers.