Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

HashtagWiki.com - Hashtag Generator Tool

Left - A minimalist multi-platform text editor

Hashtagify.me - Free hashtags search engine, with paid advanced analytics

Agenda - A date-focused note taking app for both planning and documenting your projects.

HSHTG - Generate, manage, save and edit hashtags just in a few finger tap