I want to be able to open up a file (from an app or mobile website) to show a customer, then be able to send it to them. So add a 'Email this file to Client' link that opens up an email with file attached. Is this possible in any of the Adobe Creative Cloud Applications?
Besides attaching the file to an email yourself, you can use file syncing and the Send Link feature to email a link to your customer.
File syncing is built into the Creative Cloud desktop application that you use to download and install Adobe desktop applications. Files saved to the Creative Cloud Files folder on your computer are synced up to a cloud file storage. From the Files page in a browser at https://creative.adobe.com/files you can used the Send Link feature.
The email will be sent and received more quickly since no file is attached, and your customer can download the file from the url you share.