rkt Alternatives

Apache Karaf is a lightweight, modern and polymorphic container powered by OSGi.

GlusterFS is a scale-out network-attached storage file system.

Apache ServiceMix is an open source ESB that combines the functionality of a Service Oriented Architecture and the modularity.

Ceph is a distributed object store and file system designed to provide excellent performance...

Sheepdog is a distributed object storage system for volume and container services and manages the...

The Apache Portable Runtime (APR) is a supporting library for the Apache web server.

An industry-standard container runtime with an emphasis on simplicity, robustness and portability

Apache Edgent is an open source community for accelerating analytics at the edge.

Docker is an open platform that enables developers and system administrators to create distributed applications.

Apache Mesos abstracts resources away from machines, enabling fault-tolerant and elastic distributed systems to easily be built and run effectively.

Runtime

LXC by Linuxcontainers.org is a set of tools, templates, library and language bindings. It's pretty low level, very flexible and covers just about every containment feature supported by the upstream kernel.