Qiqqa
Mendeley
Zotero
JabRef
Citavi
Docear
Paperpile
BibDesk
Reading Time
Read Time
Readlax Chrome Extension
The Read Time
iReadFast
Wordpress Read Time
MailPort
How Long to Read
QiqqaQiqqa is by far the strongest solution for research and managing pdf's. Zotero, named as a comparison is weak as it does not allow pdf;s to be loaded into its interface - you need to use a pdf reader, which defeats its whole purpose. With Qiqqa documents in a library can be searched together. It has excellent maps of your libraries. It is not prefect, having a few glitches, but still is the only one of its kind.
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Read Time - Webpage read time estimator chrome extension
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Readlax Chrome Extension - Chrome Extension - speed reading tool, online reading
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
The Read Time - Calculate read time, speech time, and word count of any piece of text all at once!