The best alternatives to Connections are FullContact, Google Contacts, and Eyecon. If these 3 options don't work for you, we've listed a few more alternatives below.
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Agree.com— Free e-signature for everyone with invoicing and payments!
FullContact is a privacy-safe Identity Resolution company building trust between people and brands. We provide the data + intelligence you need in your platforms to accurately identify people and optimize experiences—while putting privacy and security first.
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.
4Degrees identifies the right connections for you to focus on, works with you to strengthen those relationships over time, and helps you activate your network when you need it.