Signature Generator App - With Signature Generator, you can create a free digital signature by Typing or Drawing your signature. Then download your signature and use it to sign documents and contracts.
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Online Signature Maker - Create a free downloadable electronic signature
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
SignatureGenerator.how - 100% free online signature generator offers unlimited usage and integrates with Outlook and Gmail with visually-appealing templates, and no registration is required
Google Cloud Functions - A serverless platform for building event-based microservices.