Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Shift - Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Mia for Gmail - A desktop email client for your Mac, without a browser !
Lookmark - Track updates from the apps you've bookmarked on iTunes
Mailplane - Mailplane is the best way to use Gmail on your Mac. Use an unlimited number of accounts, get new mail notifications, use plug-ins and much much more.