AutoHotkey Community

[Buzcatcher]

There's a lot of renaming tools (even window managers) which allow this already, but this one caught my attention since it also adds a shortcut to the Windows Explorer context menu.

home page :
http://12noon.com/renameregex.htm

Buz.

[ManaUser]

Huh, I was thinking of making something like that in AutoHotkey, but I guess I don't have to now.

[PhiLho]

Interesting, it seems lightweight.
But I think I will stick with Flexible Renamer...
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vPhiLho := RegExReplace("Philippe Lhoste", "^(\w{3})\w*\s+\b(\w{3})\w*$", "$1$2")

[T800]

For changing file extension, try this:
Change file extension context menu