From my experience with a few softwares, Senuke works pretty well. I like it because the bookmarking is pretty seamless and it only takes a few minutes to get it going. Although, if that is your only use for it, then you can't really justify the cost.
There are one time payment programs such as bookmarkwiz which works pretty well. I think it is around $50.
Free versions exist such as onlywire (i think that is what it is called). I've never used a free bookmarking software/service, but I haven't heard anything bad about onlywire.