ACS ChemWorx is described as 'free research management and storage system for chemists that combines reference discovery and management, professional networking, group and task management, and manuscript preparation in a single, secure location, accessible from anywhere' and is an app in the Education & Reference category. There are more than 10 alternatives to ACS ChemWorx for a variety of platforms, including Online / Web-based, Windows, Linux, iPhone and Mac. The best alternative is Zotero, which is both free and Open Source. Other great apps like ACS ChemWorx are Mendeley (Freemium), BibSonomy (Free, Open Source), EndNote (Paid) and Weava (Freemium).
Zotero is a free, easy-to-use Firefox/Chrome extension or standalone program to help you collect, organize, manage, search and cite your research sources directly in your favourite word processor, with 300 MB free online storage.
Mendeley helps manage and share academic knowledge: Mendeley Desktop is free academic software (Windows, Mac, Linux) for organizing and sharing research papers and generating bibliographies with 1GB of free online storage to automatically back up and synchronize your library...
Read More, Search Less. Stay up to date with biomedical research relevant to you! Get personalized recommendations Build your cloud library and PubChase will recommend recently published articles based on the authors and journals that YOU read.
RefWorks - an online research management, writing and collaboration tool - is designed to help researchers easily gather, manage, store and share all types of information, as well as generate citations and bibliographies.