To access the mentioned applications, the user must be granted with global administrator privilege level. These applications "allow" the acces to code and it can be very dangerous - the user with access to here can damage the site. So, therefore these applications are available only to a user with highest possible permission - so it should be experienced and trained person.
However, there is a discussion about this since more customers have the same need as you do. I already contacted our product manager and told him that we have another request to split the development and let the applications to be accessible by other users than global admins.