It would open a very insterring application
Are you talking of COMPILING .ods > .exe (or into another executable)?
There are some compilers for Excel file formats which may also work with files exported from Calc into a non-native format. I don’t know any free one - and I dont know of a project inside LibreOffice for that.
Yes, you can download the portable version of LibreOffice from Portableapps here: http://portableapps.com/apps/office/libreoffice_portable/
If you want to just unpack the installation set and run the binaries instead of a real installation, see
on how to do that.