The grunge effect is not made with a font editor.
Menhir said 
Have you made any fonts,
Menhir, or do you use a font editor only to study fonts made by other people?
koeiekat said 
The grunge effect is not made with a font editor.
In theory, some grunge effects
could be made with a font editor. It may be easier, or more time efficient to use a graphic design program, but this thread is about 'on the cheap' font design.
For example, in
ScanFont 3, I could draw some contours within the glyph window, drag them onto an existing contour, and reverse the newly added contour(s), to create 'white on a black background', in print. That can probably be done with other font editors, as well.
I got it using
eMule in 2006, but It's necessary to have a computer that has Windows XP, is not connected to the Internet, and has no Windows updates after January, 2014 to still be able to use it.
It cost me $140 Canadian, from my repairman. It's a 'flat tower' model, with a floppy disk drive, that fits under my monitor, but it processes very quickly, without the Internet hogging CPU resources. I just have to use a flash drive to move files between the computers, because I'd have to connect both to the Internet, to put them on a LAN.
My
ScanFont 3 is a cracked version of the demo that was available for free download on the Fontlab home page for many years. It cost me about 14 MB of bandwidth, so I don't think anyone will find a less expensive font editor, unless their download doesn't include the .pdf manual.
Fontlab doesn't even sell
ScanFont 3 anymore. There is no truth to the rumour that Windows Vista was created specifically to prevent people from making fonts with ScanFont 3, but a Windows automatic update in February, 2014
may have possibly had that purpose.
I've only ever known of two other font authors who have fonts hosted at
Dafont and have made fonts with
ScanFont 3. One of them doesn't make fonts anymore, but the two she did make were very popular. The other designer uses a different font editor now.
All times are CEST. The time is now 20:42