1998 - late Chrysler.
I'd say either Bosch or Motorola for manufacturer, if ChryCo didn't do it themselves. Hate to tell you this, but the best way to find out is to open the case and check the board - it should be screen-printed on the board itself.
I've talked to a few people about cracking and flashing the ChryCo ECU - the reason it isn't done anywhere near as much as GM or Ford is because, while GM and Ford will sell you the software outright, ChryCo licenses it to you for a year, and charges you about twice as much for the annual license as the purchase through GM or Ford. Of course, that may change, now that Dr. Z doesn't own ChryCo anymore.
Are there programmes? OEM, sure. Aftermarket, probably.
Since most of the ECUs are fairly standard with brands and timeframe, and the "personality" is conferred by the blown PROM, what you're trying to do may be a matter of disassembling the code on the PROM and blowing a new one. What exactly are you trying to do? Decoding a PROM and blowing a new one is an option, but there may be easier ways to go about it.