Ethical Resources - Huge repository of ethical alternatives to mainstream stuff
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
Swag Fair - Sustainable swag made by small businesses
SimilarSites - Easily find more sites like those you like.
Moincoins - Cashback, coupons and rewards for small tasks.
Product Hunt - A website that lets users share and discover new products