Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
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.
C++ - Has imperative, object-oriented and generic programming features, while also providing the facilities for low level memory manipulation
Standard Notes - A safe place for your notes, thoughts, and life's work
Drift - A messaging app that helps you grow your business.
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.