HackerWeb - A simple and readable Hacker News app
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.
HackerScroll - Read top articles from HackerNews in a clean, simple and minimal interface without ads or any other distractions.
Standard Notes - A safe place for your notes, thoughts, and life's work
HNwatcher - Track keywords and users on Hacker News
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.