The Simple Issue Tracker | DoneDone
How to see if my emails are being tracked in Gmail - Business Insider
The rest of how DidTheyReadIt does it | Network World
Get the double-check in your Gmail — MailTrack
Attach | Track, secure and optimize your sales documents
Social Media Campaign Tracking with UTM | Sprout Social
8 Tips to Effectively Use Email Open Tracking to Grow Your Business - FollowUp.cc Blog
Power Up Your Inbox with Cirrus Insight - Cirrus Insight
Bananatag: Email Tracking, Scheduling, Templates & Attachment Tracking
javascript - How to track with Google Analytics on a redirection page with PHP? - Stack Overflow
USE CASES (Examples) – Support center
30+ Best Ways to Track Your Links – Support center
GitHub - googleanalytics/autotrack: Automatic and enhanced Google Analytics tracking for common user interactions on the web.
Campaign URL Builder — Google Analytics Demos & Tools