I use jQuery to speed up the development process of JavaScript and I love the way jQuery works.
I use Apache because its what my host uses and I cant really change that because I cant setup my own Apache server.
I use MySQL because it's fast and reliable. I use it to store all of the info I get from my users and Roblox.
I use Firebase for authentication, cloud messaging and the Real-time Firebase Cloud-store. Firebase is easy to use and very secure.