Sources are the tools or platforms from which the event data can be ingested into RudderStack. This event data can then be routed (with or without transformation) into your data warehouse or preferred destinations for analytics or other activation use-cases.
RudderStack's Event Streams allow you to collect your event data from all of your sites and applications and route it to a wide array of customer tools and data warehouses via RudderStack.
If you wish to contribute to developing more Event Streams for RudderStack, please refer to the contributing guide here.
For more information on the RudderStack Event Streams or the platform in general, feel free to contact us. You can also start a conversation on our Slack channel; we will be happy to talk to you!