Providing on-line non-downloadable software for determining the effectiveness of marketing campaigns based on tracked engagement; Providing temporary use of on-line non-downloadable software and applications for logging, tracking, routing, and analyzing telephone calls, conferences, and engagements with third parties; Providing temporary use of on-line non-downloadable software and applications for retrieving and presenting data obtained from prior engagements with a participant during an active engagement with that participant; Software as a service (SAAS) services featuring software for logging, tracking, routing, and analyzing telephone calls, conferences, and engagements with third parties