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.
Lunchclub - Curated 1:1 professional connections
Standard Notes - A safe place for your notes, thoughts, and life's work
Virus Cafe - Make a friend in 2 minutes
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.
Donut Slack Bot - Get matched with a new coffee buddy each week in Slack