A gatecrasher barges in without an invitation.
The person who invites you to a party is usually the party's host or hostess.
An event planner is a person who makes invitations to a given event.
To find a company who makes invitations, you should find a company online that will help us in our purposes and invitations we want to do, find a business person would also be a good idea.
Here is an online website that sells invitations online for christening. You can customize the invitations as you see fit and purchase it. http://www.preciousmomentsstationery.com/c8364/christening-invitations.html
What We call a person who makes sculpture
A person who makes of
What We call a person who makes sculpture
A person who makes maps is a cartographer.
You might call a person who makes burgers a "hamburger cook," "cook," or "grill chef."
A person who makes cart wheels is a wheelwright.
We can call them as Boat Builders.
The person is a steel-worker.
A person who makes people happy can be referred to as a joy giver, happiness spreader, or simply a positive influence.