Bigin - Introducing Bigin by Zoho CRM, the most simple-yet-powerful CRM solution for small and micro businesses. Get started today with your free CRM trial.
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Haystack Search - Haystack helps you make the most of your time, by searching all your files and documents in the cloud in one place. It's been built for privacy from the ground up, so your data isn't stored on a server, just your computer.
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.
Meilisearch - Ultra relevant, instant, and typo-tolerant full-text search API
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts