Anyway, there are quite a few types which are passably similar to Inspira (that is if you don't want to go to ufonts.com and download GE Inspira directly).
Ubuntu Titling is free.Not to be confused with "Ubuntu Title" which has no uppercase letters.
Ubuntu Regular (just called "Ubuntu") which is my personal fave. It's not rounded but it kinda works out.
You could also look on Fontspace. There are quite a few there that would work as an Inspira substitute as well. Such as BPreplay, RockoFLF, and Jolly. Except in this case, not all the fonts you find will be licensed for commercial use (say, if you wanted to use it in a commercial spot or on a magazine advert or something). Jolly is not a commercial font. The other two are however.
Of course, like I said at the outset---