Databases
MySQL
adopted
My default relational database, it's been some years already using it.
MongoDB
adopted
My default no-sql database, works well in combination with libraries like Mongoose.
Redis
adopted
Easy to use key-values database, used frequently in caches and temporal storage.
Elasticsearch
trial
Very powerful indexer, I wish I knew more about this database :)
Cassandra
deprecated
Oh boy this database. I'm probably biased by my own experience but I'd rather skip this database if possible 😖.
Oracle Database
deprecated
Very similar to MySQL, but with premium features.