I'm building a list of free and open source tools to help a group of friends sell their houses and am looking for input from others who also do this.SugarCRM (big fan of this -- not the easiest to use for newcomers, but provides great value when on a budget value)Wordpress (big fan here -- once we build a template to showcase a house, then we can then we can script out these installs)LAMP / LEMP -- Linux + Apache / Nginx + MySQL/MariaDB + PHP/Pearl (the platform all of this rides on).  

I want to customize the CRM software to automatically respond to missed calls with a text message, and create an event that will schedule a call back task.

You can search for ones in your area by clicking on tools on the top of your page, select REI resources and under assorted resources choose local REI clubs.

A friend of mine is a software developer and is offering to create a CRM system for me to get rid of my primitive DIY excel version.

-Is there any Forecasting tool that you recommend to see what kind of return should we expect? 

Are there any good online tools to help me analyze the neigboarhood markets in Atlanta, Ga?

This is a valuable tool that you can offer to your clients in the past.

The other neat thing with cloud products is that most have API that allows you to integrate one tool with another (invoicing/accounting tool with your CRM etc.) - i.e: your tools talk to eachother and share information automatically as you specify; automation is gold.

Since you are on the verge of becoming a landlord, below, are some links that will help with this transition.https://www.biggerpockets.com/renewsblog/2013/01/27/tenant-screening/ (Landlord/tenant screening)https://www.biggerpockets.com/renewsblog/2013/01/04/how-to-rent-your-house/ (how to rent your house)https://www.biggerpockets.com/rei/pay-rent-online-payment-tools/ (Online rent payment)http://www.biggerpockets.com/renewsblog/2012/12/09/how-to-be-a-landlord/ (How to be a landlord)https://www.fanniemae.com/content/tool/landlord-guidance.pdf (Fannie Mae landlord guidance)To be more successful, you simply have to work on the other elements to progress your REI pursuit.

I agree it is a really cool tool and would subscribe in a heartbeat if it covered FL and some other eastern states.