Let's do some summary.
Cobalt on JED ![POPULAR][pop]
Only after few days on JED, Cobalt already got the "Popular" mark on [JED] and is still carrying it as a proof of increasing popularity.
Cobalt is doomed to be popular. Because it is so many that was invested into it. Not only time (9 month/5 people) and money was invested into this extension, more important is the experience in this field which led to this outstanding product. Several years of building CCK solutions combined