Here's one I tried on a whim, the Platinum Pocket Brush, which has a fiber tip rather than the brush, like Pentel's Pocket Brush (which I also love!) The Platinum comes with a cartridge of Platinum's waterproof Carbon Black ink, which I enjoy in my fountain pens, though in bottle form I believe you need to shake it occasionally (The cartridges come with a little roller ball inside that keeps the ink stirred!).
At first I had problems getting the cartridge to fit in place, but the good people at Jet Pens told me how (basically, PUSH!)
I do like the line variety, from very fine to thunderously black...these are inexpensive and versatile, and well worth the $3.00 it cost and then some! (Yes, you read that right. THREE DOLLARS. With cartridge!)
You can see more here.
Like the Pentel Pocket Brush, the ink stays put when you wash over it...FUN for sketching in our journals. The fiber nib of the Platinum is stiffer, of course, but it's also nicely controllable.
And by the way, I was delighted to find that the Pentel Pocket Brush is now available at my longtime favorite brick-and-mortar art supply store, Creative Coldsnow in Kansas City! It's a wonderful warren of rooms in an old building in the Westport area...I love to explore there.
Correspondent Laure Ferlita recently tempted us with her video on the 17th, Using One Pen in Place of Three --she was using a Duke Pen, which you can find on eBay; one of our readers recommended the Sailor DE Brush Stroke Style Calligraphy Fountain Pen, which was also available from JetPens--since I was making an order anyway, who could resist??
As you can see, the nib is very similar to the Duke Pen Laure demonstrated. It will take quite a bit of practice for me to actually use it for calligraphy, but I LOVE the variety for sketching. (Check out the sample of writing on JetPens page--it IS lovely, so I guess I need to practice!)
And nope, I don't get a kickback from anyone or any company mentioned here--no free pens, no cut, I just like to make journaling and creativity the pleasure for you that it is for me!
TWSBI fountain pen I found on eBay, by chance. It's smooth and nice, AND has a built in converter with a larger than usual capacity, so I've just filled it with Platinum Sepia ink...)