Very helpful Web-Dev source (SQL as well)
https://www.w3schools.com/sql/
For German speaking Members Rheinwerk-Verlag is a good source for free online readable books with different topics
https://www.rheinwerk-verlag.de/openbook/
How about another category for "usefull/necessary stuff for development"?
Free Icons Pack for development with Visual Studio Product family: Visual Studio Image Library
https://www.microsoft.com/en-us/download/details.aspx?id=35825
IntensoPop got a reaction from Aphala in Ultimate Programming Resources Thread
