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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You can actually use ORB-SLAM and get the uncertainties. They don't provide a convenient function for it but the data is here.
Generally you want to use a Kalman Filter based method if you want access to the uncertainties. This is because it is much easier to extract a subset of the covariance in the kalman filter form. I would recommend OpenVins. One of the best open source visual odometry projects, and it is pretty well documented.
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