exe to deb conversion is actually quite often searched by users that want to install Windows application on Ubuntu or any other Debian based Linux system.
You cannot convert exe files to deb, you have to either find version of your application for Linux or use Wine or some other app that allows to run Windows apps under Linux.
Unfortunately, there is no detailed software record in the database that match this conversion.
EXE
Files with exe extension can also be found as special self-extracting compress archives. They are basically archives with a small executable program added so the end-user does not require any software to decompress it. Can be password protected.
DEB
Files with deb extension can be mainly found as Debian distribution packages - compressed archives for Debian Linux operating system. Some archiving utilities, such as 7-zip, are also able to extract the content of DEB packages.