Expose some administrative functions on the front-end
Your question is a little broad -- anything is possible given time, effort and perseverance!

I find the Role Delegation module and similar modules help to give out permissions to trusted users.

I also have been creating an Administrative Panel page using the Panels module with embedded Views and Blocks for centralized site admin options for users. I usually call this page the staff dashboard for my admin-type users.

Without specific problems you're having, these general tips are all I can provide. Happy coding!