Everybody is familiar with Ballpoint pens, you most likely use them every day.  These are the most common pen types and are usually the cheapest.  A ballpoint, pen uses a small rotating ball that dispenses ink as you write.  These pens are known for writing effectively for a long time.  A ballpoint pen uses a thicker, more viscous ink.  This ink dries instantly on paper and you avoid any smudging.  That is primarily why they are so popular.

Rollerball are a smooth writer.  They are actually much easier to write with then a ballpoint pen.  Rollerballs often put out more ink then a ballpoint. We believe it provides for a more vivid and alive form of writing.  The largest difference between a ballpoint and rollerball is the ink.  They often come in two parts, the body and the cap.  

Fountain pens are often considered the top quality writing instrument.  Fountain pens are have interchangeable nibs from a thick to fine.  Allowing the writer for a customized experience.  Fountain pens use either a cartridges or a convertor.  A convertor pulls ink from a bottled ink container.