Cardbox - Contacts reimagined as a social network ✨
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.
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
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.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.