Pobuca Connect VS EssentialPIM

Evercontact - Your contacts always up to date and automatically with Evercontact.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

CONTACTBOX - CONTACTBOX combines the simplicity of an address book with effective functions of a CRM system.

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

Bigin by Zoho CRM - Pipeline-centric CRM built and priced for small businesses

Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.