In addition to comparing two files it also allows you to edit them and the diffs are updated automatically.

Meld allows users to compare two or more folders with each other and even launch file comparisons of files contained in these folders.

GPL v2 and https://git.gnome.org//browse/meld/

Relatively fast on Linux.

Files can be filtered out depending on patterns with wildcard selectors.

Text can be ignored with regex patterns.

Straightforward and you don't need to read tutorials to use it. Just click and select and you instantly see how the difference and merges are connected to each other.

Three sub-windows instead of four, which reduces the mess during merge and let you see more of the surrounding files rather than just five lines.

Meld allows users to compare two or three different folders for differences. But if a user wants to 'zoom in' and compare files contained in these folders, Meld gives you the ability to do so and launch file comparisons between files contained in different folders or in the same folder.

Through the GNOME Translation project and the translators that have worked for it, Meld is available in multiple languages. You can check if your language is supported in the translation statistics page.

If you can't find your language or if your language translation is unfinished and you want to help, you can do so by joining the GNOME Translation Project.

In addition to comparing two files it also allows you to edit them right in place. What's more, the diffs are updated automatically.

Meld supports the major version control systems (Git, Mercurial, Subversion and Bazaar). You can launch file comparisons between different versions to see what parts changed before commiting.

Simple version control actions are also supported and possible. For example: commit/update/add/remove/delete files.

You can compare up to three different files for differences. Plus you can edit files from the comparison view and the diff will automatically update.