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.
ZipBooks - ZipBooks is online accounting software for small businesses. 100% free, forever.
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.
CountUp - Accountants for startups
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Bonsai - Bonsai is a one-stop business & finance management platform designed for creative and digital agencies. Streamline client management, track your team’s time, get paid faster and manage finances in one place.