Version 0.280 beta 1 has been released of Speccy emulator ZXMak. New in this release? Well according to DJH Downloads there are improved Z80 and VG93 engines, new disc-format and tape-support, and the obligatory bugfixes.
I also notice that on the same page you can grab an updated version (v1.2b1) of TRX2X, the Universal Disc Convertor. And handy tool for anyones box, eh?
Oh as I've already mentioned DJH, I'll say here that there's a new (extra) URL you can use to get there: zxfiles.tk. Alas it goes initially to the Russian version, but there you go, you can still use zxeng.