Meld is a visual diff and merge tool. It integrates with most version control systems. The diff viewer lets you edit files in place , and a middle column shows detailed changes and allows merges. The margins show location of changes for easy browsing, and it also features a tabbed interface that allows you to open many diffs at once.
Meld is a gnome2 diff and merge tool with pluggable support for version control systems such as cvs, subversion, bzr, darcs, mercurial, monotone, tla.
lose its distinct outline or shape; blend gradually; "Hundreds of actors were melting into the scene"