Free Software for SaaS
Storyblok
A headless & API-based CMS with an opt-in head and a visual editor. With Storyblok you can manage your content through an intuitive dashboard and access that data though the content delivery API, as nested JSON. Storyblok is an open-source software and can be used as such, but is also provided as a commercially hosted, cloud rendering service. As a front-end developer you can choose to work with any template engine, framework or system of your choice.
Rooftop
Rooftop is a open source and managed, API-only implementation of the WordPress CMS. With Rooftop, developers can harness the power of WordPress and write frontends in any language. Rooftop can be used to build websites, web applications and mobile applications.
TinyLetter
TinyLetter is a peronal newletter service by the creators of Mailchimp. With TinyLetter, people can communicate with fans and friends for free. The service provides a similar experience to that of Mailchimp, without the bussiness features. It's easy to get started with TinyLetter, and a great way to start email list for communities, non-profits and hobby projects.
Socioboard
Socioboard is a social media automation toolkit for small businesses. With Socioboard you can automate lead generation, marketing, customer support and social engagement.
TimescaleDB
TimescaleDB is a leading open-source relational database for time-series data. The database is provided as fully managed or self‑hosted software, giving the power of choice back to developers and organizations. Timescale gives you all the reliability and flexibility of PostgreSQL. It allows you to use regular SQL to construct queries to better understand your products and your users. While achieve 10-100x faster queries than PostgreSQL, InfluxDB, and MongoDB with native optimizations for time-series.
SMTP2GO
SMTP2GO is an email delivery service and technology that gets your emails sent, while robust reporting gives you a clear picture of what happens behind the scenes. SMTP2GO takes cares of blacklists, feedback loops and IP reputation so you don't have to. With real-time insightful reporting you can track every email, from sent to opened, and get your emails into inboxes.
SEO Site Checkup
SEO Site Checkup is a tool that can help you identify common technical SEO problems surrounding your website. When you test your site with SEO Site Checkup, you get awarded a score and a list of information on things to improve. The SEO Site Checkup includes Meta Title Test, Meta Description Test, Google Search Results Preview Test, Most Common Keywords Test, Keywords Usage Test, Keywords Cloud Test, Related Keywords Test, Competitor Domains Test, Heading Tags Test, Robots.txt Test, Sitemap Test, Broken Links Test, SEO Friendly URL Test, Image Alt Test, Inline CSS Test, Deprecated HTML Tags Test, Google Analytics Test, Favicon Test, Backlinks Test, JS Error Test and a Social Media Test. All of which can help you improve your overall search ranking.
Photo Raster
The Photo Raster is online photo editor with advanced features for photo editing and painting.
HubSpot Meetings
HubSpot Meetings i a free all-in-one, online appointment scheduling software. HubSpot Meetings aims to improve appointment bookings and the way meetings are scheduled, atended and completed. HubSpot Meetings is part of the HubSpot line of software as a service product line and integrates well with HubSpot CRM and other third-party services such as Google Calendar, and Office 365 Calendar.
Rocket.Chat
A free, unlimited and open-source chat software. Rocket.Chat have set out to be a replacement for email, HipChat & Slack and is provided as Software-as-a-Service (SaaS) or a self-hosted community edition. Rocket.Chat is feature packed and can be used for video conferencing, file sharing, voice messages and more. The software integrates with third-party services like GitHub, GitLab, JIRA, and Confluence and provides an API that can be used for authentication and integration across these services.