Every time I send invitations to others and they do anything with it (decline or accept) I get an email as notification. In our team meanwhile are a lot of emails every day, we don't need to have. An option to opt it out, that you get notified about anything would be nice! Maybe distinct between several notification options

I have a shared contacts list with tens of thousands of contacts, all with birthdays. It would be nice if I could opt out of syncing birthdays to my phone, so that I wouldn't get daily alerts about them.

Events of other users should be shown side by side. That would be way more easy and overseeable than one upen the other.
I would be very thankful in you added this feature.

A simple dowload of all information stored. The .ics, .vcf and .ics task files in one .zip file. This would permit users to have a clear and easy interface for creating a backup of data/account information.
Many thanks.

When you invite someone, would be nice to upload logo and stuff, the invitation mail looks personalized though. Or in another words: invitation mails with your own corporate design!

I share team shares with my team. When I call delegation from someone, I also see all the team shares, again. So I have it always double the times I someone delegated to me and see all the entries multiple. Would be nice you can define, these team shares are not visible by definition. Not to opt them out via interface

Increase the total of supported devices to a more convenient number in the basic plan. Maybe three will be good.

please add ISO 8601 under the Settings => 'date format' option.

When you add an account, you dont have time to specify in your phone how to make the sync, eg. one way sync, web to phone.
Which uploads 'garbages'

Maintain a single list of contacts with sync specification.
In each contact, you can specify to which devices it will be synced.
Sync with my phone, not my wife, not my sister.
Sync with my phone, not my wife, with my sister.
Just for those who have (almost) no secrets for their wife :-p

To be able to have online the same settings/display that you have on your mobile

Allow fruux and zoho calendar synchronization

I'm seeing that green option bar and notice that deals with most of the workspace so i think:
Why not put this bar in one side of the workspace instead of the top.
More workspace and a lot cleaner, especially for the small screens.

It would be awesome to synchronise two CalDav / CardDAV Server to each other for e.g. families that use different kind of email providers but want to have the same calender/contact data.

Currently it will show that an attendee exists, but you can't change them or add new people to the list to send a notification.

A different colour for college activities, society meetings, family gatherings, etc.

On the web interface the addresses books are on the left, each with a different color. But the contacts, listed in the middle of the page, have color(s) which do not match which address book they are listed in. So I need to open each contact, one at a time, to figure that out. Thanks.

When sharing calendars, all events get shared with their notifications. In my eyes it does not make sense to get notifications for a read-only calendar of my colleague. It'd be nice to disable the notifications on a calendar base.

I like how you can publish calendars and such, but I would like to see more options in terms of publishing a group of calendars together. My mom works two jobs, and wants to put in each job as a different calendar, but share her entire work schedule with her husband, not just one at a time.

so the user can see exactly where they are on their schedule (feature for the web app). the feature is suitable for week and day layouts.