Caffeine is a tiny program that puts an icon in the right side of your menu bar. Click it to prevent your Mac from automatically going to sleep, dimming the screen or starting screen savers. Click it again to go back. Right-click (or ⌘-click) the icon to show the menu.
We have pretty complex extension so we decided to write Chrome API compatibility layer. It allows us to run our existing Chrome extension as an Safari app. extension.
I'm using Trezor hardware wallet which also has password manager (https://trezor.io/passwords/). I'm storing important secrets there (e.g. master password to my regular password manager which is Avast Passwords).
Agreed that pair programming is great to get productive ASAP. That's what I did in my current job. Instead of working on some minor things alone I asked my team-mate to pair with me on a task which was most important/valuable at the time. We spent few weeks working together on various things, and they were quite surprised that I was able to get up to speed so quickly.
If you are fan of pair-programming this may be really good opportunity to introduce this technique to your new team. Since then, we use it whenever we feel it will help.