I'm aware of ATMEL still making 5V devices. But which programmer do you need and how much does it cost?
Their ATF15xx series are standard JTAG. I purchased their
programming kit because it also includes testing facilities. However, I don't see any reason why a suitable JTAG adapter driven from a parallel port couldn't be made.
.... And also what software is required? And is it available for anything besides Windows?
Atmel has a free download for WinCUPL, which is their somewhat enhanced version of CUPL, which supports any PLD that can be programmed via a JEDEC fuse map. I don't know if CUPL is available for other than Windows. This may be a case where Windows running as a virtual machine on Linux might work, but I haven't investigated doing so.
I'd be interested to see what alternatives there are, in the 5V line. In the 44 pin realm, the XC9572 is hard to beat with its 72 macrocells. At 88 pins, the XC95108, with 108 macrocells (hmm, I see a pattern) is also pretty good. It seems a shame that Atmel didn't add more macrocells with the increasing pin counts.
Atmel's ATF1508AS is available in PLCC84 and has 128 macrocells.
BTW, are you going to use VHDL or Verilog? (or ABEL) in your next POC. Just curious.
I'll be using CUPL. Again, I haven't investigated it, but it appears VHDL or ABEL could be used.