Here are some popular websites for creating flowcharts, including a brief introduction for each:

1. Lucidchart Lucidchart is a web-based diagramming tool that allows users to create flowcharts, mind maps, org charts, and more. It offers real-time collaboration, a wide range of templates, and integration with various other tools like Google Drive and Microsoft Office.

1. Creately Creately is an online diagramming tool that provides a user-friendly interface and a large selection of templates for flowcharts, org charts, wireframes, and more. It supports real-time collaboration and offers integrations with popular apps like Confluence and Slack.

1. Addgraph Addgraph is a tool for creating diagrams and flowcharts. It supports five different layout options and offers two methods for adding elements, making it easy to design and customize your diagrams. Users can access it via a simple interface for efficient diagram creation.

1. Draw.io Draw.io (also known as Diagrams.net) is a free online diagramming tool that offers a comprehensive set of features for creating flowcharts, network diagrams, UML diagrams, and more. It supports integration with Google Drive, OneDrive, and other cloud storage services.

1. Gliffy Gliffy is an easy-to-use online diagramming tool that allows users to create flowcharts, Venn diagrams, UML diagrams, and more. It offers a drag-and-drop interface, real-time collaboration, and integration with Atlassian products like Jira and Confluence.

1. SmartDraw SmartDraw is a powerful diagramming tool that offers templates and features for creating flowcharts, floor plans, organizational charts, and more. It provides robust integration with Microsoft Office and Google Workspace, making it a versatile choice for professionals.

1. Cacoo Cacoo is an online diagramming tool that enables users to create flowcharts, mind maps, wireframes, and other types of diagrams. It supports real-time collaboration and offers a variety of templates and shapes to facilitate diagram creation.

These tools cater to different needs and preferences, making it easier for users to create detailed and professional flowcharts.