LIst of custom log viewer

• SPLogViewer - supports loading and filtering one file, does not follow/tail log displays data in a DataGrid.
• SharePoint Log Viewer  
• Stonebond SharePoint Log Viewer  
• ULS Deobfuscator - 
• SharePoint ULS Log Parser - one click access to log files, supports filtering by Process Name, Level, Area and Category.
• Log Viewer Feature - access from Central Administration, select individual log basic filtering on category, event and trace severity, output as HTML in Central Administration.
• WSS / MOSS Log File Reader - Access to individual log files from Central Administration, standard DataGrid filtering and sorting options.
• Stefan Gordon's ULS Viewer - Open individual log, does not follow/tail log, displays data in ListView detail. Filter by secerity, process category and free form text.
• SQL Integration Services - All reporting, sorting and filtering options provided by MSSQL (Blog Post with ETL Package Download), time consuming to setup.
• LogParser - Familiar interface to IIS Administrators, pleanty of options. Setup takes too long for small installations.