1. campaign monitor
Campaign Monitor makes it easy for you to create, send, and optimize your email marketing campaigns.
Find which gems contain a given string
Rails plugin to add full text search. The last update on this gem is 3 years ago. Dead project.
4. photo gallery
5. lightbox Checkout lightbox2 or Checkout Lightbox for Bootstrap that integrates Lightbox 2 with Twitter Bootstrap 3. This project has not been updated for over 2 years. Is this : Masonry Image Gallery with Bootstrap 4 Modals a good alternative.