MailerSend - Better transactional emails for teams.
UCINET - UCINET for Windows is a software package for the analysis of social network data.
HEY - Email at its best, new from Basecamp.
Gephi - Gephi is an open-source software for visualizing and analyzing large networks graphs.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Pajek - Pajek is a lightweight solution developed from scratch by an extraordinary team of developers for the purpose of Large Network Analysis.