UMLGraph
draw.io
Dia
LucidChart
yEd
OmniGraffle
UMLet
CollabNet
CloudZero
Vantage
Cast.ai
nOps
Spot.io
Cloudability
Kubecost
Flexera
UMLGraph
CloudZerodraw.io - Online diagramming application
Vantage - Vantage is a Fire Pre-Planning and Survey Tool built with the assistance and input of actual fire responders and dispatchers.
Dia - Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.
Cast.ai - CAST AI is an AI-driven platform designed to optimize cloud usage and reduce costs by over 60%. It is an all-in-one solution for Kubernetes monitoring, automation, optimization, and security.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
nOps - Cloud management for AWS. Track changes, costs, performance, security, & continuous compliance with AWS Well-Architected Framework.