Below are the links I recommend for Prospect Research:
Address & Phone Resources
Clustrmaps - search by name often (but not always!) provides address, address history, other persons living at address, neighbors, other properties owned, phone, email and birthdate
Aircraft Lookup
Biographical Information
LinkedIn – provides current employer and title as well as employment history; also lists degrees and educational institutions attended; sometimes lists professional and community affiliations
Business Information
Government Resources (local)
Missouri Case.net – searchable database of Circuit Court records in Missouri; limited detail only provides basic information on everything from traffic tickets to estates to divorces
Library Resources (local)
Mid-Continent Public Library - free library card entitles access to several online databases including local and national newspaper archives, obituaries, genealogy resources, and other databases
Political Contributions
Open Secrets – search by donor name, state, zip code, occupation or recipient; links to actual copy of FEC contribution filing with home address, employer and occupation of donor
Public Company Salaries & Holdings
Real Estate Resources
Google Maps – provides aerial and sometimes “street views” of residences
Pulawski.net – tax assessor database by state. Named for Christina Pulawski, a former prospect researcher at Northwestern University, now a fundraising consultant
Trulia – nationwide real estate database searchable by city, zip code, or property address
Zillow – nationwide real estate database searchable by city, zip code, or property address
Paid Resources
LexisNexis for Development Professionals ($300-$500 per month for one user) – multi-function toolkit for fundraisers includes address & phone history, birthdates (month & year only), e-mail addresses, family relationships, real estate assets, newspaper archives, and employment links.
DonorSearch
iWave PRO
WealthEngine
These are multi-function websites for fundraisers and researchers which aggregate data from several public sources. These include capacity ratings, charitable giving, Dun & Bradstreet, Federal Election Contributions, Foundation Search, Guidestar Directors and Foundations, Hoover’s business information, Marquis Who’s Who, aircraft and large watercraft ownership, and more!
Subscription price often includes monthly webinars and best practices white papers.
Great for small research shops who need a lot of information quickly!
p.s. And don't forget to Google!!!