MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Raygun - Raygun gives developers meaningful insights into problems affecting their applications. Discover issues - Understand the problem - Fix things faster.
Percolator - Percolator: the always fun, supremely unique photo app that is sure to surprise you! FEATURES:
Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.
RabbitMQ - RabbitMQ is an open source message broker software.