So is any open source database.- Web enabled.

Or does anyone have a spreadsheet or database they would like to share?

.- Have your agent email your new listing to all contacts in their database to drive additional interest.- Canvas the neighborhood with “Just Listed” postcards and advertise in community publications.- Have your agent create an email marketing campaign to send to all agents who are actively working with buyers in the area.- Submit the house to the broker housing tour.- Launch a targeted advertising campaign on Facebook, Instagram and other social media outlets.- Create a video walk-through and post it to the MLS, Youtube, and social media sites.- Ensure your agent posted the property to your multiple listing service (“MLS”) and it has syndicated to all other real estate affiliated websites.AND price it competitively..... 

Hard money lenders have a database of investors they've loaned money to for real estate investments.

It costs some real money to put a team of advisers together, university administrators, teachers in specialty areas of business, legal council, a CPA, special software built for educational development, technical support and (thousands of) hours of coordination and management as well as content development before the doors are opened.

There's also a database of homes in MI that have already been deleaded, which is a nice bit of info to have when making a purchase. http://www.michigan.gov/mdhhs/0,5885,7-339-71550_2955_2983-19420--,00.html

Currently you can invite someone by email address, but it needs to sweep the database to see if that person is already a member.

There are no custodians or Third Party Administrators.

Use the county online tax assessors database to find out who owns the house (mine doesn't show the tax mailing address...grrrrr) When you find the owner, send them a yellow letter (see above)Online free marketing - Craigslist, backpage, and kajiji are the major players.

Anybody know of a database that compiles this?