BetterChat for WhatsApp - Gorgeous new full-featured WhatsApp client for the Mac.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
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.
Number To Whatsapp - A utility tool which lets your start a Whatsapp conversation without saving the contact of the said person first.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .