Swimlanes.io is a free webapp for making sequence diagrams. You simply edit the text on the left and the diagram is updated in real time. You can download your sequence diagrams as images or distribute with a link.
Title: Coderbunker Members Management System _: **Joining** Manager -> Member: invites Member -> Profiles: creates Manager -> Groups: updates group membership _: **Snapshot** Profiles -> System: read profiles Groups -> System: read groups System -> DB: store profiles and groups DB -> DB: Match profiles to groups _: **Viewing** DB -> GraphQL: exposes GraphQL -> WebFE: displays _: **Updates** WebFE -> GraphQL: applies for group membership update GraphQL -> DB: insert request DB -> System: import requests into spreadsheet Manager -> System: approves System -> Groups: update membership