Add Fast Save & Share

[yunxijun]

Types of Changes

• [x] New addition to list
• [ ] Fixing bug in existing item in list
• [ ] Removing item from list
• [ ] Changing structure (organization) of list

Proposed Changes

1. Add a Free Tool Fast Save & Share , which makes it easy to upload and share files, photos or documents with your Dropbox account.

PR Checklist

• [x] I have read the CONTRIBUTING guide
• [x] I have explained why this PR is important
• [x] I have added necessary documentation (if appropriate)

Further Comments

• N/A