Free Stock Photos
- https://css-tricks.com/sites-with-high-quality-photos-you-can-use-for-free/
Free Marketing Automation Software
- https://www.mautic.org/
Website Analytics
- https://www.google.com/analytics/web
A/B Testing Software
- Freemium Service: http://optimize.ly/
Email Marketing
- Freemium Service: http://mailchimp.com/
Via TechnoRealism, LLC (Gary Palmer Jr.) & the Open Source Marketing Project (Ben Hunt) / CC BY-SA 4.0