If you don't need to launch an entire press release for every feature update, then Beamer is a great way to surface minor updates internally to your platform users. The internal news update that is shown to platform users allows us to add helpful content to logged-in users.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
AnnounceKit - Announce product updates like a boss 😎
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Headway - Keep customers in the loop about your product.
Octopus Deploy - Octopus is a friendly deployment automation tool for .NET developers.
Changelogfy - Changelogfy is an all-in-one platform to collect, organize and manage customer and teammates feedback, prioritize and build a product roadmap, and announce product updates.