Gmail Mail Merge - Send personalized emails with attachments
Dynamic Campaigns by Sigstr - Share the most relevant content in every email
Tropical.io - Connect your CRM and other sources (Mailchimp, Unbounce, GoToWebinar, Uservoice, and more) and we tell you which leads are hot
PushMarket - Automate personalized emails for ecommerce (YC15)
Sublime Text - Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.
Mailmeteor - Send hundreds of personalized emails with Gmail.