amoCRM is the world's first messaging-powered CRM. Multi-channel communication lets you converse through messengers, emails, and calls from a single app. Now every interaction with your customers can be a personalized one-on-one dialogue. Plus managers love its powerful analytics, reporting, and automation tools. It's the perfect messenger-based sales solution for entrepreneurs and SMBs.
Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
HubSpot CRM - Free CRM software for small businesses.
Qiqqa - Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.
Keap - Grow Sales. Save Time. Get Organized.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .