There is the entire world of Bookmarking apps out there, here's A-B

100zakladok

2tag

2linkme

7live7

A1‑Webmarks

A97abi

Addio

Addressbar

Menu

Adfty

Adifni

Aerosocial

Allmyfaves

Amazon

Amenme

AOL Lifestream

AOL Mail

Armenix

Arto

Aviary Capture

Baang

Baidu

Bebo

Bentio

Biggerpockets

Bitly

Bizsugar

Bleetbox

Blinklist

Blip

Blogger

Bloggy

Blogmarks

Blogtrottr

Blurpalicious

Boardlite

Bobrdobr

Bonzobox

Bookmarkedbyus

Socialbookmarkingnet

Bookmarkycz

Bookmerkende

Bordom

Box

Brainify

Bryderi

Buddymarks

Buzzzy