Qiqqa 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.
Based on our record, Instapaper seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Instapaper is a bit simpler to use than pocket. It has a straightforward user interface and it will accept most forms of online content that you throw at it. - Source: dev.to / over 2 years ago
Here's my workflow: I open the email, scan the list, save the links that look interesting to me in my Instapaper, and delete the email. Later, when I have time to read, I go ahead and read the saved articles in Instapaper. - Source: dev.to / over 2 years ago
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Pocket - When you find something you want to view later, put it in Pocket.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
wallabag - Save the web, freely.