(Some) Magic Tools for Salesforce Architects

This is a small set of tools that I think we should have always at the back of our heads when designing enterprise-scale architecture.
What are your magic tools?

1) ESB & ETL
2) FormAssembly
3) OwnBackup / Odaseva
4) Chargent
5) X-Files Pro
6) Conga + DocuSign
7) Quip & Slack
8) Marketing Cloud
9) Okta / Ping
10) Salesforce Voice
11) Git + Provar + Copado + Jira / Azure Board
12) Heroku

Thanks, Jagannath Chakraborty for putting it together.