I love the features they provide but are there any free alternatives the provide the same or close enough functionality?
Here is what I'd like a tool to do:
I've tried a few plugins but none of them come close to what these paid services provide
It's does everything like Boomerang and allows unlimited use... free for up to 3 users per Google app domain.
It's been free for a while since I believe they're in beta. They'll likely make it to into a paid service like Boomerang down the line.
If you have 3 or less people on your team, then fits your needs. If not, Boomerang really is worth the nominal price they charge.