SWTBot is an open-source Java framework for testing SWT and Eclipse-based applications. It provides an easy API to automate UI testing similar to a click-robot by handling SWT complexity. SWTBot's API can be integrated into JUnit tests to develop and run test cases. It allows finding widgets using text, labels, groups, tooltips, or IDs, and performing common actions like clicking, typing, and selecting. SWTBot also takes screenshots on errors and supports different test execution modes like via launch configurations or from the command line.