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.
AnnounceKit - Announce product updates like a boss 😎
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
Headway - Keep customers in the loop about your product.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
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.
Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.