Free Software for SaaS
Discourse
Discourse is an open source internet forum and mailing list software. The application is written with Ember.js and Ruby on Rails, and can be self-hosted in the cloud or on local hardware for free. Discourse also provides managed hosting starting at $100/month, so that you can focus on building a community rather than installing software and managing servers.
Matomo
Matomo is the ethical alternative to Google Analytics that does not sacrifices user privacy. The web analytics platform provided by Matomo guarantees 100% data ownership and is provided as a free and open source self-hosted solution or a commercially managed service by Matomo itself.
StackEdit
StackEdit is an open-source, browser-based Markdown editor with a wide varity of features. It allows you to edit multi-Markdown documents in offline and online modes, lets you store documents in HTML and PDF formats, and collaborate with friends and co-workers though third-party cloud services such as Dropbox, GitHub and Google Drive. A bonus feature of StackEdit is the integration with blogging platforms like Blogger, Tumbler, and WordPress where your documents can be outputted as Markdown or HTML with Handlebars template engine
GitLab
A web-based tool for DevOps lifecycle management and source code hosing. GitLab, much like GitHub use the open-source technology Git for repository management and code reversion. On top of that GitLab provide extra services like issue-tracking, wiki and CI/CD pipelines for code deployment. The main difference between GitLab and GitHub is that GitLab is open-source and the whole platform can be self-hosted on your own server. GitLab also provides the same hosted repository solutions provided by GitHub.
Azure DevOps
With Azure DevOps developers can plan smarter, collaborate better, and ship faster with a set of modern dev services. Azure DevOps a set of tools provided as a part of Azure cloud that can be used by developers to collaborate on software projects and do CI/CD integrations.
Vizzlo
Create high-quality charts and business graphics easily online, in PowerPoint, or Google Slides.
Torque360
Torque is a cloud-based workflow management software, tailormade for the aftermarket auto-repairs and services industry. Torque helps garage owners focus on their core business activities while eradicating the hassle of using different tools for managing their shops, cutting out manual paperwork and eliminating guess-work on all fronts.
Substack
Substack is a place for independent writing where readers can subscribe directly to writers they trust.
Metabase
Metabase is an open-source tool that allow data and analytics to be shared fast and easy within a company. The open-source business intelligence server provided by Metabase can be installed within 5 minutes. Metabase can also, easily be integrated with third-pary services and databases like Amazon Redshift, Druid, Google Analytics, Google BigQuery, H2, MongoDB, MySQL, Oracle, PostgreSQL, Presto, Snowflake, SparkSQL, SQL Server, SQLite and Vertica. The software is provided free and open-source under the GNU Affero General Public License (AGPL) and managed server solutions can be purchased at a monthly subscription.