Klogg - A fast, advanced log explorer based on glogg project . Klogg is a multi-platform GUI application to browse and search through long or complex log files. It is designed with programmers and system administrators in mind. glogg can be seen as a graphical, interactive combination of grep and less.
Runs on Unix-like systems, Windows and Mac thanks to Qt5.
Is fast and reads the file directly from disk, without loading it into memory.
Can operate on huge text files (10+ Gb is not a problem).
Search results are displayed separately from original file.
Supports Perl-compatible regular expressions.
Colorizes the log and search results.
Displays a context view of where in the log the lines of interest are.
Watches for file changes on disk and reloads it (kind of like tail).
Is open source, released under the GPL.