generategem
Generate Gem is a Gemspec Builder for your project, type generategem and the shell will asks the name, version, date,etc from your project.
Install
To install the Generate Gem do:
gem install generategem
Usage
Type generategem and the shell will asks the name, version, date, summary, description, authors, email, files, homepage, license and executables from your project, and your gemspec file will be created.