Innago - Innago offers a cloud-based property management platform for landlords with small to midsize property portfolios. Innago is 100% free to use and comes with a long list of affordable features.
cheat - Cheat allows you to create and view interactive cheatsheets on the command-line.
AppFolio - AppFolio is the premier online property management software for modern residential and rental property managers. Try it free today.
cheat.sh - The only cheat sheet you need Unified access to the best community driven documentation
Rezlynx PMS - Next generation cloud based PMS. Rezlynx is PCI compliant, and suitable for any sized hotel or group. It streamlines processes and is seamlessly integrated.
explainshell - Match command-line arguments to their help.