The phrase “serverless” doesn’t mean servers are no longer involved. It simply means that developers no longer have to think "that much" about them. Computing resources get used as services without having to manage around physical capacities or limits.
Let's take for example AWS Lambda. "Lambda allows you to NOT think about servers. Which means you no longer have to deal with over/under capacity, deployments, scaling and fault tolerance, OS or language updates, metrics, and logging."
Kinvey - Build your digital business faster with mobile Backend as a Service.
Syncano - An all-in-one platform to create realtime apps without a server.
Hoodie - Hoodie is a complete backend for your apps: develop your frontend code.
Para - Flexible and lightweight backend service for rapid prototyping, based on open source software.
Backand - One platform to develop and run multi-cloud Serverless applications.
Hosting and code execution in the cloud
Amazon Lambda - Run code without thinking about servers. Pay for only the compute time you consume.
Google Cloud Functions - Lightweight, event-based, asynchronous compute solution that allows you to create small, single-purpose functions that respond to cloud events without the need to manage a server or a runtime environment.
Spotinst Functions - Devploy serverless functions with our easy to use framework that launch onto the Spot Market for cheap and convenient use.
Azure Functions - Listen and react to events across your stack.
Fission - Fast, extensible, open source serverless functions on any Kubernetes cluster
IBM Cloud Functions - Distributed compute service to execute application logic in response to events.
Kubeless - is a Kubernetes-native serverless solution.
iron.io - Isolates code and dependencies of individual tasks so they can be processed on demand.
OpenComponents - Serverless microservices for front-end components
Kloudbit - Kloudbit helps developers build robust applications without the hassle of backend coding and server management.
Stackery - Stackery enables teams of developers to design, deploy, and monitor their serverless infrastructure on cloud services providers like AWS
Isomorphic Engines
lychee.js - Isomorphic adapters allow peer-to-peer event-graphed WebSockets and HTTP1.1, SPDY and HTTP2.0 sockets for node, node-sdl, html, html-nwjs and html-webview (both native and embedded).
Frameworks
Apex - Minimal AWS Lambda function manager with support for multiple languages including Nodejs, Golang, Python, Java, Rust and Clojure.
Architect - Provision and deploy from a super simple plaintext manifest
Up - Deploy infinitely scalable serverless apps, apis, and sites in seconds.
Chalice - Python serverless microframework from Amazon for AWS lambda
CIM - A CloudFormation first approach to AWS Lambdas.
ClaudiaJS - Deploy Node.js microservices to AWS easily.
DEEP - Full-stack Web Framework for Cloud-Native Applications and Platforms using Microservices Architecture.
Gordon - λ Gordon is a tool to create, wire and deploy AWS Lambdas using CloudFormation
Gestalt Framework - Gestalt's Lambda Application SERver (LASER)” for short, is a lambda service that supports running .Net, Javascript, Java, Scala, Ruby, and Python lambdas.
IronFunctions - The Serverless Microservices platform
Kappa - a command line tool that (hopefully) makes it easier to deploy, update, and test functions for AWS Lambda.
Lambda Forest - Microframework that makes it easier to develop REST API's using AWS Lambda Function and API Gateway.
modofun - A lightweight no-dependencies function router for both AWS Lambda and Google Cloud Functions, and that supports Connect/Express middleware.
Python-λ - A toolkit for developing and deploying serverless Python code in AWS Lambda
Serverless Framework - Build and maintain web, mobile and IoT applications running on AWS Lambda, Azure Cloud Functions, IBM OpenWhisk, and Google Cloud Functions (formerly known as JAWS).
Shep - A framework for building APIs using AWS API Gateway and Lambda
Sparta - A framework that transforms a Go application into an AWS Lambda powered microservice.
GCF-Stripe - serverless use of Stripe over Google Cloud Functions
eCommerce
Snipcart - Fully customizable, HTML and JavaScript-based shopping cart for any website.
CommerceJS - Full-stack ecommerce api for developers & designers.
EndlessCommerce - Open source ecommerce platform based on Serverless framework.
Content Management Systems
Storyblok - API based & Headless CMS - Clean and structured JSON for you as developer and a CMS your editors will fall in love with. Unlimited extensibility through custom plugins.
Tipe - Next generation serverless CMS. Create your content with powerful editing tools and access it from anywhere with a GraphQL or REST API.
Forms
Form.io - JSON Powered Form and Data Management Platform for Serverless applications.
TellForm - A free, opensource form builder similar to Google Forms or TypeForm that can create stunning forms for recruiting, market research and more.
Pageclip - A Server for your HTML Forms - Collect info from users without a server—Pageclip is your server. Lead capture forms, surveys, newsletter forms, contact forms, etc. Setup any form in seconds.
Typeform - Pretty, intuitive, slick forms for almost any use.
Image management and File storage
Filestack - Image management system with Filestack - upload files, transform images, videos, and documents, store content and deliver fast via CDN.
Kloudless - Integrate with one, universal API and connect to many file storage and CRM services.
Uploadcare - HTML5 widget, API to manage files in cloud storage, smart and fast CDN to deliver them to your end users. Crop, resize and transform uploaded images using URL commands.
ReSRC.it - The Responsive Image Service that delivers brilliantly optimized, pixel perfect images to any device.
Letter Avatar - Generates Google-like binary avatar images
Realtime
Ably - Global distributed realtime data delivery platform with pub/sub, presence, device awareness, history, connection state recovery, authentication and encryption.
FaunaDB - Pay-as-you-go cloud database with ACID transactions and on-premise licensing available.
Cloudant - Based on the Apache-backed CouchDB, Cloudant is the distributed database as a service (DBaaS) built from the ground up to deliver fast-growing application data to the edge.
Others
Azure Function Library - An open source set of common use cases for Azure Functions that are ready to deploy!
aws-lambda-go - Run standard Go code on the AWS Lambda platform.
Cloud Native Applications free eBook: an introduction into the world of cloud computing and insights into what is possible with cloud services.
Exploring Cloud Computing free eBook: an introduction to the two most popular cloud providers, Amazon and Google, and insights to help you get started.
AWS Lambda in Motion - An example-driven tutorial that focuses on helping you understand and tackle the operational challenges with running AWS Lambda in production.
OpenWhisk Workshop - Interactive workshop to learn about building serverless applications with OpenWhisk.
Newsletters
Serverless Weekly - Everything you need to know about Serverless, week by week.
Serverless Status - A weekly digest of the latest serverless news and articles.