Software for keeping tracker of investors share

[Craig Schneider]

I flip about 8 properties at a time and I have 6 investors.  Each investors capital is spread out over a few properties.  Once I sell one there initial investment as well as there profit goes back to capital I can allocate to a new property.   I am about to bring in more investors to do more properties.

I need to make sure I do not over invest in properties, and I would like to have an easier way to keep track of peoples returns and total capital  after each project.

Currently I use excel but it is getting a bit out of hand.  Does anyone know of any programs that may assist me?

Thank you