crm addon3 crm extension3 productivity module3 perfex crm2 secure access2 user-friendly interface2 appointment booking1 booking module1 calendar management1 client booking1 collaboration tool1 creative planning1 diagram tool1 multi provider1 notifications1 real time availability1 saas booking1 scheduling system1 service booking1 sketchboard1 slack alert1 slack chennel1 slack integrastion1 slack notifications1 staff scheduling1 task management1 user friendly interface1 visual planning1 visual workspace1 workflow management1