Google Analytic, Google Adwords and Google webmaster tool are also mine favorite software,instead of these tools and software i like robo form software very much, it is a automatic form filler. It simplifies my work.
Yeah, I think browser and some kind of form filler can be a good way to submit link to link directories and can save time on completing forms. Of course there are downsides, as there is security risks involved using form auto complete add-ons.
I think the days of SENuke are long gone and results are not as good as it used to be, actually it is more dangerous to use it than not to use it. Same apply for other "black hat" SEO applications like ScrapeBox or SickSubmitter. Websites might experience severe penalty after latest Panda and Penguin updates.