I have done a little clothes sewing for myself in the last couple of months. Anyone who has sewn for themselves when pregnant knows that pattern options are very limited. So I have been modifying patterns I already own.
I made this pattern a couple of times last year and it is so comfortable. It did not take much modifying to turn it into a maternity dress - I just made it more a-line, more so with the front piece than the back. I just made one in black and have been wearing it a lot.Katrin dress/tunic by Mamu Designs is also a good pattern that does not need much modifying. I am not sure where I bought this but if you google Katrin Mamu you find lots of options, some in Australia.
Circle Top from Papercut Patterns. It looks pretty simple and is sooo much quicker than knitting myself a cardigan at the moment. I have some merino wool jersey perfect for it and will try and make it today.
Tova pattern is also pretty easy to modify for an expanding stomach. I made one slightly more a-line at the front and when I placed the front piece on the fold of the fabric to cut out I moved it an inch or so over from the fold and then cut so there would be more fabric at the front.
I recently discovered that Megan Nielsen has nice modern maternity pattern. Not sure if I will try them as I think I can make do with what I have now, although I would like to try her Darling Ranges Dress next year.