ZoteroBib is a free service that helps you build a bibliography instantly from any computer or device, without creating an account or installing any software.
You can use words or symbols called search operators to filter your Gmail search results. You can also combine operators to filter your results even more.
How to use a search operator Go to
Paperscape is a tool to visualise the arXiv, an open, online repository for scientific research papers. The Paperscape map currently includes all (non-withdrawn) papers from the arXiv and is updated daily