Screenshot of a project in the graphical user interface of cApp. Different tasks (appraisal, similarity searches) or sets of one project appear under different tabs. Views of a particular compound in the Jmol molecular viewer and the JChemPaint chemical editor are available with a single mouse-click. The project shown illustrates an appraisal task (loaded from the file ‘test.smi’). Views of CMPD288 in the Jmol molecular viewer as well as the JChemPaint chemical editor are activated.