I am not so sure that you are under a link-based penalty. I know you did not ask for this, but I had a look at your website's link profile, source and index health.
1. SEO: The online web form market is hugely saturated. You probably can not compete with Wufoo on terms like "web form builder". Honestly ask yourself if you currently deserve a top 10 spot for this term. Are you a top 10 player in this field? Explore more specific and longtail keywords. Create better targeted pages and page titles. "Documentation - NicSoft Software" is a missed chance. Create more content on the blog (inbound marketing).
2. Links. You do not have enough natural links to beat competitors. They get linked from webdeveloper forums by real users of the software. You also should check out Google's stance on "Powered by"-links. If this turns in the majority of your backlinking profile, you get links from a lot of bad neighborhoods. These links may thus do more harm than good. It is not an editorial link, but probably in exchange for a free version of the product. Much safer to nofollow links created for profit or SEO/online marketing purposes.
3. Site HTML is not well-structured for information retrieval. For every page on your site, the first heading is "Home". Browse your site with styles disabled. Reorder repeating boilerplate code below the relevant page content. Specify a canonical or make sure only one version is served to visitors with redirects (both www- and non-www versions of the site return duplicate content).
4. Index health is poor. Robots.txt file is indexed. There are a few inactive subdomains, an unattended Wordpress and Drupal install in a subdirectory. Includes are indexed as separate pages "/inc/footer.php". Documentation (the content "meat" if the site) is off limits for bots. Over 90% of pages on the site are in the secondary index, which is not a good sign.
About 10 hits a day from Google is far too low for any commercial site to survive on. You could get more than 10 hits on a random wordlist.
Do not solely think about in-links. Are you even linking to reputable sources yourself? End-node sites are far less interesting for visitors than hub sites.