A post (in English, this time) of my pens because everyone always asks about them. They were all bought here in Brazil (unless stated otherwise) at local bookstores or stationery shops.
Unipin 0.1 - This is the one I use most; I’ve had it since July and, surprisingly enough, it is still working fine. The ink isn’t so strong so it doesn’t bleed through the paper, and it has a constant flow. I think its only con is the fact that it isn’t too comfortable for writing, since you have to hold it very vertically. And you might find it a bit pricey. Example posts: x x x x x x
Stabilo point 88 - I would highly recommend this for most people. It’s cheaper than the unipin fineliner and its writing looks good. I personally find it too thick for my taste, and it does bleed a little bit more.
Cis gelyx 0.5 - This is one of my favorites. I like gel ink better than nankim, because they look darker in the paper. However, this pen specifically gets weaker with(in a short period of) time, so its line ends up thinner. Example posts: x x x x x
Gilifa micro gel - I bought this pen when I was in China 4 years ago, and I haven’t found a good enough replacement ever since. It’s seriously my favorite pen ever. I just don’t use it much because I don’t want it to stop working. Example posts: x x
Sum chrome - You can see in the picture above that its writing looks really bad and it has an uneven flow. I don’t use it (ever?).
Wexford retractable gel pen - I don’t use this one so much because it doesn’t have the most constant flow and its point is a bit loose, so it’s not so comfortable to write with.
Paper Mate ultra fine - I would also recommend this for most people. I haven’t had it for a long time, but it writes great. It’s not much different from the Stabilo one, it’s only finer.