Stitch is a wrapper around a Cassandra database. It has a web application that provides read-access to the counts through an HTTP API. The counts are written to Cassandra in two distinct ways, and it's possible to use either or both of them:

• Real-time: For real-time updates, Stitch has a processor application that handles a stream of events coming from a broker and increments the appropriate counts in Cassandra.

• Batch: The batch part is a MapReduce job running on Hadoop that reads event logs, calculates the overall totals, and bulk loads this into Cassandra.

We build queries in PHP with DSQL that work with SQLite. We also have SQLite data controller, so that you can build SQLite-based models.

Document (JSON) DB.

• - queries must be pre-defined as views (not as flexible as query formulation on the fly)
• - community and ecosystem not as large as mongodb
• + PouchDB is an excellent JS library to interact with CouchDB or even work in offline-then-sync moce

Used during the "build process" of Coolfront Mobile's Flat rate search engine database. Flat rate data that resides in Salesforce is transformed using SQLite into a format that is usable for our mobile Flat rate search engine (AKA: Charlie).

RDBTools is a self-hosted application, and it is important that the installation process is simple. With SQLite, we create a new database file for every analysis. Once the analysis is done, the SQLite file can be thrown away easily.

By being built on, of, in and around CouchDB, Smileupps offers to its customers secure and reliable CouchDB hosting and a CouchDB-based app store to build and sell serious business-enabled web applications

Cassandra is our data management workhorse. It handles all our key-value services, supports time-series data storage and retrieval, securely stores all our audit trails, and backs our Datomic database.

All the dynamic data (i.e.: jobs) is stored in a simple SQLite database.

Все динамические данные (вакансии) хранятся в простой SQLite БД.

While we experimented with Cassandra in the past, we are no longer using it. It is, however, open for consideration in future projects.

We are using Cassandra in a few of our apps. One of them is as a count service application to track the number of shares, clicks.. etc

There's really no call for something heavier for this site. SQLite is simple, easy to use and quite reliable given its age.

Datastax interview

We use CouchDB in an internal analysis tool for usage data.

Storage for unstructured, linked and timeseries data.

json store + geo + _changes