I find most project managers quite happy using Excel, Word and Powerpoint. The free equivalent (since you're asking for that) is LibreOffice.
HRM is much more difficult, especially the payroll part, due to the differences between rules in different countries. Generally, the software isn't free, and you need a maintenance contract to stay up to date.
I'm a trainee HR executive in a Game developing company. There are less than 30 employees in the firm.
We're in search of a free tool or software that can be used to Manage Human Resources & Projects. It must have Leave Tracking, Payroll etc.
It'll be a great help is you can suggest some..