We can think of Minio Server as the self-hosted version of Amazon S3. Although it does not have all the features of Amazon S3, we can use most features. We can also use it directly from the browser. We can also use it with most applications that support S3.
Sync data between databases and marketing/ops tools.
I am starting to like this thread more and more. Here is my contribution to it:
Open-source Observability platform, a nice alternative to datadog
Some other contributions.
- Theia CloudID: https://theia-ide.org/
- Headless CMS: https://strapi.io/
- Graph Database: https://dgraph.io/
- Big Data Database: https://cassandra.apache.org/
Let’s keep this thread going, it’s beautiful!
Open-source knowledge base/wiki: getoutline.com
Although I do like open source self-hosted just remember the purpose of this thread is to find tools that complement Wappler’s development workflow 
Notion alternatives(outline, notea, etc) are ok if you are going to use them to document your app development. So they can be considered indeed.
I just write this as a reminder so you guys don’t lose focus on the why. It easy to go from notion alternatives to a google photos self hosted alternative without noticing.
Cheers!
Thanks a lot for the kind words and thanks @JonL for the initial mention.
I’m from the Appsmith team and the entire team is hard at work, the last few months have seen a tremendous interest in our project and everyone is burning the midnight oil to come up with new features, nurturing the community and (sigh) fixing bugs 
Segment alternative:
Loom alternative:
Doesn’t really fit in this topic, but still it could be interesting for you guys when trying to explain a bug, a problem your are looking a solution for or just to showcase something.
two great shares here.
The project is young, the documentation is minimal, but I tried it, it looks promising!
- Connect to new/existing SQL database and turn them into spreadsheet.
- It is free & self-hostable. Let your imagination be thy limit.
- Create grid view, gallery view, kanban view and calendar view (not ready) on top your data.
- Search, sort, filter columns and rows with ultra ease.
- Collaborate just like spreadsheet.
- Provides REST & GraphQL APIs with Swagger & GraphiQL GUI
Newsletter and mailing list manager:
Heroku alternative:
Report generator, from JSON to pdf, xslx, docx, odt…
Auth0 alternative: