What apps, tools, chrome extensions, services etc do you use to be more productive?

I would love to know what tools keep my fellow developers productive. Moreover, this can serve as a comprehensive list of tools/services developers use for better productivity. So, please share your secrets! :D

Is TDD (Test Driven Development) an overkill most of the times?

Should I change the startup because the product is fake and the company is lying to the investors?

The company I am working at has a fake product. It has no real use and has been backed by a top VC firm. The company founders too are lying to the investors. What should an employee do? Change the company? Stay and gain the experience?

Which laptop do you use to work?

Developers... developers... developers... What's your current machine specs and which laptop do you use at/for work?

What strategies do you use to decouple UI from the main logic in your applications?

Let's assume the application is an eCommerce platform. No language preference.