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, Toodledo seems to be more popular. It has been mentiond 1 time 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.
I tried a lot of apps, a LOT. Currently I use ToodleDo and Google Keep + Google Calendar. ToodleDo is like a bucket for everything I have to do (sooner or later). Google Keep is for my daily todo. Google Calendar is to keep me on schedule. Source: almost 2 years ago
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .