Tags App - hashtags for Instagram and other social networks. It contains more than 11000 useful and relevant hashtags for you to copy and paste fast in more than 290 popular tag categories.
Tweetbot is an award-winning, full-featured* Twitter client for the Mac. It has a beautiful interface with light & dark themes, multiple-column support and much more.
Flexible writing and note-taking tool with markdown, plain text storage, cross-note links, hashtags, powerful search, Focus Mode, iCloud sync, and export options.
Thinkery is a fast and lightweight tool for storing notes, bookmarks, todos, organized through #hashtags. Bookmarks are stored in full-text. Android and iOS app available.
