Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
nxlog - NXLog offers log management solutions for companies of all sizes.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Splunk - Splunk's operational intelligence platform helps unearth intelligent insights from machine data.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.