Both Freeware and Shareware available for download

Overall

Kiwi Log Viewer displays text based log files in a tabular format. Only a small section of the file is read from a disk at a time, which saves memory and allow you to view files that are larger than available memory.
The tail option monitors the specified log file for changes in real-time and displays any new data that is added.
Text string matches allows important text to be highlighted by using colors or bold/italic font emphasis. Text matching options include simple sub-string matching or more powerful PERL style Regular Expression matching.
The Find function can search through your file to locate any matches of your choice.
Support for command line arguments allow you to specify the file to load and where to display the viewer on the screen. this makes it possible to setup shortcuts to your most frequently viewed log files.

For details

http://www.kiwisyslog.com/kiwi-log-viewer-overview/

Register and download Free version of Kiwi Log Viewer here

http://www.solarwinds.com/register/kiwi_registration.aspx?Program=884&c=70150000000EIWt