SQL (Structured Query Language) is one of the most popular amongst the data science field.

R is an open source language and software environment for statistical computing and graphics, supported by the R Foundation for Statistical Computing.

Oracle Cloud Marketplace is an online store—a one-stop shop—selling hundreds of business apps and professional services that complement your existing Oracle Cloud implementation.

All apps and services on the marketplace are offered by approved, registered, and expert partners and developers. Plus, Oracle has vetted, reviewed, and approved each product.

Oracle Cloud Marketplace:

CAFFE is a deep learning framework, originally developed at University of California, Berkeley. It is open source, under a BSD license. It is written in C++, with a Python interface. More info https://caffe2.ai/ or https://pytorch.org/

CISCO Marketplace, https://marketplace.cisco.com/home integrates

• Cisco Technology Solutions, https://marketplace.cisco.com/solutionsshowcase shows how third-party solutions are fully integrated with Cisco technologies.
• Catalog of CISCO products, https://marketplace.cisco.com/catalog

Azure Marketplace provides access and information on solutions and services available from Microsoft and our partners. Customers can discover, try, or buy cloud software solutions built on or for Azure. Our catalog of 8,000+ listings provides Azure building blocks, such as Virtual Machines (VMs), APIs, Azure apps, Solution Templates and managed applications, SaaS apps, containers, and consulting services.

Amazon Web Services Marketplace is a digital catalog with thousands of software listings from independent software vendors that make it easy to find, test, buy, and deploy software that runs on AWS.

JanusGraph is a scalable graph database optimized for storing and querying graphs containing hundreds of billions of vertices and edges distributed across a multi-machine cluster. It is a project under The Linux Foundation, and includes participants from Expero, Google, GRAKN.AI, Hortonworks, IBM and Amazon.

More info https://janusgraph.org/

OrientDB is an open source NoSQL database management system written in Java. It is a Multi-model database, supporting graph, document, key/value, and object models, but the relationships are managed as in graph databases with direct connections between records.

More info https://orientdb.com/

Azure Cosmos DB is Microsoft’s proprietary globally-distributed, multi-model database service "for managing data at planet-scale" launched in May 2017. It is schema-agnostic, horizontally scalable and generally classified as a NoSQL database.

More info https://azure.microsoft.com/en-us/free/cosmos-db/