Do business research for any length of time and you'll likely be called upon to locate Form Ds. And as we bizologists like to say, why not find them for free? First of all, what is a Form D? Our friends at Investopedia define it as "a filing with the Securities and Exchange Commission (SEC) required for companies that are selling securities in reliance on a Regulation D exemption or Section 4(6) exemption provisions." But for our purposes, let's use a simpler definition. Start-up companies file Form Ds when they raise money. And while there are a couple of paid subscription databases you can use to track down Form Ds, you can also find them on FormDs.com.

FormDs.com, founded by former private equity firm investor Robert Hunt, offers a couple of paid services like monitoring or custom projects, but you can also get quite a bit of great information for free.

My favorite feature is their "Local FormDs" showing investments in a particular city. I simply click on my city of choice and I see a list of recently funded companies in my area which shows me the date and the amount of funding. Even better, once I click on a particular company, I can see their address, company directors and executives, a link to the actual Form D and, better still, a link to other companies in the same industry.

Speaking of industries, I can also filter by industry, location, amount and dates. And then display these results as a list or as a map. Below you'll see I've created a filter showing all the biotechnology companies recently funded in Texas.

FormDs.com definitely earns a spot on our Favorite Resources page.