MongoDB Change Stream is a high-level API that allows you to subscribe to real-time notifications whenever there is a change in your MongoDB collections, databases, or the entire cluster, in an event-driven fashion.
mitmproxy is a free and open source interactive HTTPS proxy.
google-cloud, Python idiomatic clients for Google Cloud Platform services. There is an older Python library also officially supported by Google, google-api-python-client, which is in maintenance mode.
A replica set is a group of servers that maintain the same data set, with one primary which takes client requests, and multiple secondaries that keep copies of the primary's data. If the primary crashes, secondaries can elect a new primary from amongst themselves.
IPFS stands for InterPlanetary File System, but you could simply consider it as a distributed, permanent, but ridiculously slow, not properly functioning version of web. You could upload any static file and static website to IPFS. And the whole swarm would probably distribute your files to the moon, that might be why IPFS is so fucking slow.