Synnefo is a complete open source cloud stack written in Python that provides Compute, Network, Image, Volume and Storage services, similar to the ones offered by AWS. Synnefo manages multiple Ganeti clusters at the backend for handling low-level VM operations and uses Archipelago to unify cloud storage. To boost 3rd-party compatibility, Synnefo exposes the OpenStack APIs to users.

Synnefo - Open source Cloud Software, Used to create massively scalable IaaS clouds

Galera cluster provides distributed, multi master support for MySQL and MariaDB. Its feature include Synchronous Replication, True Multi-master,  Active-Active Cluster Read and write to any node at any time, Automatic Node Provisioning, Multi-threaded Slave and lot more. 
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Galera Cluster is a superb replication system when using MySQL or MariaDB for your databases. However, it does have some limits for which you may want to be aware before migrating to it. Within the database server, other than the system tables, which use MyISAM, only InnoDB tables are allowed. InnoDB is used because it’s an excellent transactional storage engine. All tables must have an explicit primary key, either a single or a multi-column index.

Galera cluster provides distributed, multi master support for MySQL and MariaDB. Its feature include Synchronous Replication, True Multi-master,  Active-Active Cluster Read and write to any node at any time, Automatic Node Provisioning, Multi-threaded Slave and lot more. 

Galera - Cluster for MySQL and MariaDB

JPPF enables applications with large processing power requirements to be run on any number of computers, in order to dramatically reduce their processing time. This is done by splitting an application into smaller parts that can be executed simultaneously on different machines. 

JPPF - Parallelize computationally intensive tasks and execute them on a Grid

Cascading is a Data Processing API, Process Planner, and Process Scheduler used for defining and executing complex, scale-free, and fault tolerant data processing workflows on an Apache Hadoop cluster. It is a thin Java library and API that sits on top of Hadoop's MapReduce layer and is executed from the command line like any other Hadoop application.

Cascading - Data Processing Workflows on Hadoop

Csync2 is a cluster synchronization tool. It can be used to keep files on multiple hosts in a cluster in sync. Csync2 can handle complex setups with much more than just 2 hosts, handle file deletions and can detect conflicts. It is expedient for HA-clusters, HPC-clusters, COWs and server farms.

csync2 - cluster synchronization tool

Helix is a generic cluster management framework used for the automatic management of partitioned, replicated and distributed resources hosted on a cluster of nodes. It helps to perform scheduling of maintenance tasks, such as backups, garbage collection, file consolidation, index rebuilds, repartitioning of data or resources across the cluster, informing dependent systems of changes so they can react appropriately to cluster changes, throttling system tasks and changes and so on.

Helix - Cluster Management Framework

Apache Geode  is distributed, in-memory database for scale-out applications. All data is stored in-memory for low latency. Performance scales linearly as nodes are added. Data is distributed automatically between nodes to optimize performance. Clusters fail-over to other nodes in case of failures, and rebalance remaining resources. Geode servers can be configured to talk memcached protocol. 

Apache Geode - Distributed, In-memory Database for Scale-Out Applications

PiCluster is a simple way to manage Docker containers on multiple hosts. Docker Swarm not that good and Kubernetes was too difficult to install currently on ARM. PiCluster will only build and run images from Dockerfile's on the host specified in the config file. This software will work on regular x86 hardware also and is not tied to ARM.
<ul>
<li>Move containers to different hosts in the cluster</li>
<li>Run commands in parallel across Nodes</li>
<li>Heartbeat for services</li>
<li>Easily build and orchestrate Docker images across nodes</li>
<li>Web interface</li>
<li>Monitor host metrics (Disk, CPU, Memory)</li>
<li>HTTP interface</li>
<li>Virtual IP Manager</li>
<li>Rsyslog Analytics</li>
<li>Built-in web terminal to easily run commands on nodes</li>
<li>Integrate the Kibana dashboard into PiCluster</li>
<li>Integrates with Elasticsearch to store the PiCluster logs.</li>
<li>Automatic container failover to different nodes</li>
<li>Pull container images from a registry</li>
<li>Upload Dockerfile archives to the entire cluster</li>
<li>Functions-as-a-Service (FaaS)</li>
</ul>

PiCluster is a simple way to manage Docker containers on multiple hosts. Docker Swarm not that good and Kubernetes was too difficult to install currently on ARM. PiCluster will only build and run images from Dockerfile's on the host specified in the config file. This software will work on regular x86 hardware also and is not tied to ARM.

PiCluster - Manage Docker Containers

evQueue is an open source job scheduler and queueing engine. It features an event-driven C++ engine and a PHP / MySQL web control interface which provides tasks monitoring and creation. It provides both simple task execution and complex task chaining (workflow) using an easy to use drag & drop web interface. Workflow description includes output linking to input, conditions, loops... Queues management provides an easy way for task parallelization and resource control.
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The network API provides an easy way, XML based, for synchronous or asynchronous workflow launching and control, allowing tasks to be launched from external applications or web pages. You can thus execute heavy tasks on a remote (dedicated) machine to save resources on your web frontends while providing live reporing of the treatment to you users.

evQueue is an open source job scheduler and queueing engine. It features an event-driven C++ engine and a PHP / MySQL web control interface which provides tasks monitoring and creation. It provides both simple task execution and complex task chaining (workflow) using an easy to use drag & drop web interface. Workflow description includes output linking to input, conditions, loops... Queues management provides an easy way for task parallelization and resource control.

evQueue - Job scheduler and queueing engine

Swarmlet is a self-hosted, open-source Platform as a Service that enables easy swarm deployments, load balancing, automatic SSL, metrics, analytics and more. Swarmlet uses Traefik, Consul and Let's Encrypt to provide automatic SSL and load balancing on your apps. Swarmlet is nothing more than a thin wrapper around Docker commands. It builds applications, stores them in a local or custom registry and deploys them on your swarm.

Swarmlet - A self-hosted, open-source Platform as a Service

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