Twicca - Twicca is a Twitter client for Android that is simply awesome. Features: * Notification
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
HootSuite - Enhance your social media management with Hootsuite, the leading social media dashboard. Manage multiple networks and profiles and measure your campaign results.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.