I do use LinkStash and it is the best I've seen so far. The developer John is working on a major update now. I was planning to write a review on it and I will sometimes next week. I have also used netsnippets as a bookmark manager but its limited search was a turn-off. Powermarks was another one I liked a lot, but it looks like it is abadonware now.

This is how I look at if from an a conceptual level...
There are 2 problems we're faced dealing with programs and files in general...
- finding/launching them in the shortest time/effort possible.
- Organizing them.
FARR is the only one I've seen that handles both with most efficiency. It is not enough for me to launch a program fast as most of these launchers do pretty good. The organization aspect is not any less important and this is why I abandoned TypeAndRun and SlickRun. Often times, I need to know what editors I have and be able to use any on the spot. Another example is to know what search engines I have and use any as the the need dictates right then. This organizational aspect is overlooked by command line tools which is the primary focus of their GUI counterparts via the use of folders and trees. FARR came with the concept of aliases where you can group your files and even sub-search them, pass arguments to them, and launch dynamically at usage time. Up to this date, I have not seen any command line tool that offers this features with such strength.

One of the significant features of FARR is that it searches when you ask it to. It does not rely on an index and all its associated overhead. I tried almost every app Mouser listed in the help file and could not bear with index overhead. AppRocket was the best I've seen but its index overhead just drove me away.
I agree with Mouser, if you do add an index feature, please make it optional and selective at the folder level.