You can use Visual Studio, Unity, Eclipse, etc. In order to make your application. Multiple files are allowed, DLL files, INI files, etc. Installers are not permited. Optional TXT containing infromation about your application can be inclued in you zip file, more infromation on how to make an application can be found in the Coding page of this website and in Place Holder
Please compress your files in a standard windows ZIP Archaive. if you do not have Windows you may use TAR as your file format or any of the formats supported by linux.
Uploading your application is simple, simply use the upload form that can be found at the bottom of the Applications page
Please note that only 500 mb is permited. may increese in the future depending on your feedback