This has lead to a bit of (expected) pain as I try to replace some critical bits of software that I need for daily tasks.
I use UltraEdit on the PC constantly. I use (or have used) it for everything from HTML to ABAP to C++ to hex viewing to fixing & reformatting TSV & flat files to (you get the idea). It is certainly one of the applications that I use most and I know it inside out.....And it is not available on the Mac.

So, the search begins for a replacement. BBEdit looks good. Is there anything better?