Link200
Link200 will determine the validity of bookmarks or favorites in Firefox, Internet Explorer, and Netscape. Link200 is an easy to use step-through wizard that guides you through the entire process. No longer do you have to worry about going to a favorite or bookmark only to find out the site is... Users can automatically delete the bad websites using Link200's clean option or you can specify which ones you would like to remove on a per website basis. ... Link200 will handle the checking and cleaning.
http://www.veign.com/downloads/link200.zip - 2Mb - Download - Screenshot

inBookmarks
inBookmarks is a powerful bookmark solution. It allows you to store, organize, comment and check you Internet pages. It has many powerful facilities that replace and compliment the browser's bookmark management systems. You can easy add URLs from all opened browser sessions. ... You get capability to import and export bookmarks to text, HTML files and you favorite browsers. ... inBookmarks supports all major Windows browsers. ... It also supports drag- drop operations.
http://www.hexilesoft.com/files/inbookmarks.zip - 864Kb - Download - Screenshot

Lunarmark
Lunarmark is the program to synchronize your bookmarks between multiple browsers any time you want. It makes managing your bookmarks easy and efficient.
http://www.spaceblue.com/download/?File=Lunarmark0.5.2.exe - 1Mb - Download

dotBookmark
dotBookmark may very well be one of the top 10 most useful freeware tools currently available on the Internet. Essentially, this free software works as a Bookmarks/Favorites replacement, allowing users to "take" their bookmarks to any PC and keep them synchronized with the user's bookmarks on... It looks exactly like the regular bookmarks do, but the software does erase the existing bookmarks in the browser. ... dotBookmark gives people many options to organize their bookmarks, create new folders, drag and drop links, rearrange URLs.
http://www.dotbookmark.com/download/setup.exe - 6Mb - Download - Screenshot

Link Commander
A major problem with efficient web surfing is organizing favorites and managing the links to the web sites we have visited and found to be of interest. It is a well known fact that finding a web site that meets our needs and re-visiting it is much more effective than searching the web each time. ... Link Commander integrates with your web browser(s), automatically importing all your current favorites and bookmarks into a links collection. ... Once this is done, you can organize your bookmarks into groups, sort them based on an extensive set of criteria, set individual link verification...
http://www.resortlabs.com/bookmark-manager/lc_setup.exe - 4Mb - Download - Screenshot

Social Bookmarking API
Social Bookmarking API ActiveX Component for submitting to del. icio. us, furl. net, etc. Add bookmark submission capability to your programs and scripts. Suports Visual Basic, ASP, VBScript, Delphi, and any programming language supporting ActiveX.
http://www.worldwideweb-x.com/BookmarkingActiveX.zip - 504Kb - Download - Screenshot

Opera/IE Bookmark Convertors
These two utilities will convert your bookmarks/favorites from the Opera browser to the Internet Explorer browser format, and vice-versa. Why recreate your favorite links from scratch?
http://www.kgpsoftware.com/downloads/lnkcnv10.zip - 26Kb - Download - Screenshot

CornerStone iBrowser
CornerStone iBrowser is a skinable multi-page browser with all the features of Microsoft Internet Explorer and has enhanced tools for Internet surfing. It enables you to surf multiple Web pages simultaneously and speeds up site navigation. It features a tabbed document metaphor, with each tab... You can add comments to each bookmark, organize it into multiple categories, add custom information, search, print, backup and distribute your bookmarks.
http://www.cornerstone.m6.net/ib/download/iBrowser.exe - 10Mb - Download - Screenshot

Compass
Compass has been a popular and powerful bookmark manager program since its first release in January, 1997. It supports three most popular browsers - Netscape, Internet Explorer, and Opera. Plus, it can launch any system specified generic browsers. Not only is Compass a bookmark manager, but it... Compass can easily handle more than several thousands of bookmarks. ... With the power of Template, you can export your bookmarks or notes in the format you want. ... Export with Template lets you export bookmarks or folders to the format you want.
http://www.simtel.net/pub/dl/52527.shtml - 741Kb - Download - Screenshot

Belkasoft BookaMark
Organize and manage your bookmarks easily with Belkasoft BookaMark! Search them by different criteria, find duplicates, export and import from ICQ/Miranda history, XM, Internet Explorer Favorites, Opera Bookmarks, Mozilla/Mozilla FireFox Bookmarks. Programmers, make use of handling MSDN links. ... Enjoy other useful BookaMark functionality that helps you save your time. ... Easily track all your links that you have copied through the day with the unique 'clipboard logging' feature. ... Increase your performance with extremely convenient feature of binding shortcuts to frequenlty used...
http://www.belkasoft.com/download/bbm203.zip - 3Mb - Download - Screenshot