Zeplin - Collaboration app for UI designers & frontend developers
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Abstract - A secure, version-controlled hub for your design files
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.
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .