Here is a small list of handy websites every academic should know:
> Library Genesis
http://gen.lib.rus.ec/
Every book you'd like.
> Forensically
https://29a.ch/photo-forensics/#forensic-magnifier
Neat tool for discovering edited photos.
> Sci-Hub
Use a search engine for the latest URL. Nearly every paper that you might need is available here. Get around shitty publishers too.
> Alternativeto
https://alternativeto.net/
Great site to check of if a popular tool you use has an open-source alternative.
> AIST
https://sdbs.db.aist.go.jp/sdbs/cgi-bin/cre_index.cgi
Nip database for all of the NMR, IR, GC-MS spectra of the desired compound. Slow and annoying but powerful search engine.
> ptable
https://ptable.com
Instant periodic table with many options and data available.
> fxSolver
https://www.fxsolver.com/
All the formulae for all the sciences, ready to fill in and convert.
> Symbolab
https://www.symbolab.com/
Algebraic solver, calculator and all-round mathematical replacement for Wolfram Alpha.
> Desmos
https://www.desmos.com/calculator
Online graphing calculator.
> Overleaf
https://www.overleaf.com/
Work on a shared LaTeX document that is backed up for you. Free service is already amazing, backup on the cloud and and OK typesetter. If you have a campus license, you can work with up to 10 people on one document.
> WebQC
https://www.webqc.org/
A lot of tools for Chemistry, Mathematics and Physics like formulae, calculators, point group tables, simple drawing tools and some more. Has some other things what the others don't.
You might need a Campus VPN / session key for these
> Reaxys
Fill in a chemical reaction and get the reaction conditions and scheme to make it.
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> Chemwatch
MSDSs, compound data and physical parameters
> HCPonline
http://hbcponline.com/faces/contents/ContentsSearch.xhtml
Detailed list of a lot of basic chemical and physical constants, as well as data and property tables of chemicals.