Trello Review

You can easily and automatically create a stand-alone webpage for every single event. Add all the details for the event, then share the event page link with anyone who needs to help/be part of it. You can use comments to discuss details on the event page. Easy, free, makes it easy to collaborate on individual tasks or projects without a big setup.

Integrate schedule with your task management --- because if you don't know when you're going to do it, are you ever going to?

Boot-strapped company, run by the original founders/developers, fully committed to supporting and improving the product over time. Over 3 million users currently

Works well for individual/personal work, free plan is more than adequate for this or for running a small business. Easy to scale if needed, paid plans available.

For both iOS and Android. Free, fully functional.