Quickly distinguish which sandbox you're working in by setting up a distinctive header for each.
Salesforce Apps and Tools in Org Header for Salesforce
Salesforce Marketplace is a platform that lists ready-to-install Salesforce solutions, like, apps, tools, codes, plugins, browser extensions and other components and services available in the market. It’s a place that powers you to connect with customers and extend Salesforce across any department and industry.
Salesforce Marketplace is the one-stop solution for all your requirements as you won’t have to wander around anymore looking for the best tools to make the most out of your Salesforce CRM.