More about Time Series Databases

An actual question in connection with M2M and Smart Cities tasks - Open source databases for time-series, events and metrics. E.g.:

• Geras
• KDB+
• TempoIQ
• InfluxDB
• IstatD
• Open TSB
• Kairos DB
• Graphite
• BlueFlood
• Vena
• Riak
• Stats RRDB

What is else?