Inkscape
About the software: Inkscape is a free and open source software having the same capabilities as Adobe Illustrator. It is highly useful for making professional quality illustrations for scientific papers, presentations, or posters/flyers for formal events.
Download link: https://inkscape.org/
FIJI (Fiji is just ImageJ)
About the software: FIJI is the ultimate free and open source software for image analysis and processing. The most simple yet most useful software for working with microscopy data.
Download link: https://imagej.net/software/fiji/downloads
OneNote
About the software: It is an free software from Microsoft which has the word editing features for recording scientific content. Also, it can be used across devices in both app version and web version. Excellent for using it as an electronic lab notebook and for making notes from literature reading.
Downlaod link: https://www.onenote.com/download
Slack
About the software: An app for messaging for professional purpose among group members and collaborators.
Download link: https://slack.com/intl/en-in/downloads/windows
PicPick
About the software: We often don't realize the importance of a good screenshot-taking software. PicPick is a free software which allows taking high quality screenshots, even in free-hand style!
Download link: https://picpick.app/en/download/
