Pisth - Pisth is an open source SSH and SFTP client for iOS.
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Prompt 2 by Panic - The best SSH client for iOS
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
SocketXP - Raspberry Pi and IoT device remote access, monitoring, control and management at scale.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.