I still use TextMate. I don’t know whether development has slowed or stopped, but I haven’t had any issue recently. I find it less clunky and nicer than Sublime Text, which is my second choice and my escape route the day TextMate dies. It’d be a pain to convert all those bundles, though. TextMate’s support for esoteric language grammars is second to none and last time I checked some of mine depended on features not implemented in Sublime Text.