WinLogTail is a freeware log viewer, monitor and analyzer.

Features:

• fast open and browse log files, regardless of file size
• monitor log file for changes live - as new log lines are appended, they are instantly visible in WinLogTail
• "rules" for highlighting, searching and alerting
• rules use either regular expressions or simplified order-insensitive logical patterns
• highliting: specify font style, foreground and background color for any log line according to its content (for example, red color for lines with word "error")
• searching: output certain lines to "filtered view" (also updated live)
• alerting: you can send WinLogTail to background, and it will flash window or play sound as soon as specific line is appended to the log file
• context scrolling: click a line in filtered view, and the main view will scroll to the relevant position
• can define multiple rules at once, modify, delete, rearrange, deactivate etc
• import and export rules
• command-line options to quickly select file, rules and operation mode
• copy to clipboard or export to file - in plain text, RTF or HTML formats
• small executable file with no installation and external dependencies
• free

Limitations of current version:

• unicode logfiles not supported (ansi lat only)
• logfiles >2GB not supported