Hi r/entrepreneur I was wondering if you knew what the best free management software for small businesses would be for sales, accounting, organization, budgeting, internal control etc.?

In particular I am most interest in the sales management, I was looking for a system to keep track and alert me to certain customers who have not been contacted in X amount of days, along with the logging of their data into. Thank you so much! The other stuff would be supplemental as I have MS professional office suite, quick books and INeedABudget.