Qiqqa
Mendeley
Zotero
JabRef
Citavi
Docear
Paperpile
BibDesk
Leap Motion
Google Scholar
360° media
Forge
OpenSpace3D
A-Frame
Project Play
CardBoard
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.
Based on our record, Leap Motion 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.
100$/hr sounds a bit suspicious, your last post was three years ago trying to get hire people for https://leapmotion.com/. You didn't mention any of the features you wanted here either. Source: 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.
Google Scholar - Google Scholar is a freely accessible web search engine that indexes the full text of scholarly...
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
360° media - 360 Media is a boutique public relations, digital marketing and event-planning agency in Atlanta specializing in lifestyle, entertainment and hospitality.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
Forge - Static web hosting made simple