I’m sorry to have to ask this noobish question but i’m new to unity. I have been browsing the asset store for space-like 3d models but i can’t find any i really like. I want to make my own textures and models and unity does not have that software in it. Is there any kind of software out there on the internet that i can use?
No. There is not. You would think that, by the year 2013, someone would have invented image editing and polygon modeling software, but if they have, it must be a closely guarded military secret.
Currently, all new assets are made in Santa’s workshop at the North Pole, and flown by storks to the chosen elite.
Seeing as how you’re the first person to ever ask this on Unity Answers,
that should tell you how futile a Google search would be.
There’s a lot of software out there, all of them require a lot of practice in using. If you’re looking for free - Blender works for your modelling http://www.blender.org/ and Gimp for image editing (texturing) http://www.gimp.org/ .
As Kiloblargh mentioned, doing a search will find you plenty of options. None of them quick and easy. 