Android/iOS: Want to give the numbers or emails of a few tradespeople to your buddy? ContactBox is the easiest solution to create custom lists from your contacts and share them with others.
To do something like this right now, you need to create a common Gmail account and sync contacts. ContactBox is a simple, free app for both Android and iOS where you can just create lists of people from your existing contacts or add new ones. You can individually edit each contact too, adding them under groups or titles like "company X" or "doctors".
When you're done, just share the list with anyone else and they will be able to access it as long as they have ContactBox installed. The list is then updated when either user adds or edits any contact. It's a great way to have a list of good take-away restaurants with your friends, or a master contact list for your office that updates when anyone quits or joins.
ContactBox (Free) [Google Play Store]
ContactBox (Free) [iTunes App Store]