Hi. If you have any interest in automation of your social bookmark submitting process, but for any reason don't want to use third party products, you could try to write your own submitter. I've started a new blog "Writing your own Social Bookmark Submitter" where I try to show and explain in details how to create a bookmark submitter from a scratch. There you will find how submitters work, what submitters you can use in your SEO without any fear to get banned, and what automated software you should better avoid. People write "don't use automated software", but why not, if it's your own. Click here to start reading.
I'm creating my own submitter using PHP. Works good when you want to spam a platform no one else is targeting--and therefore no tools exist.
The tool is not something that interests me but I would be curious to see how it is developed. I didn't see anywhere in the articles currently published which tells us what tools or software we are likely to need to be able to develop such an application.