Your results contain 10 solutions with the following criteria :

VoIP / Telephony
Solution Smile rating Users rating Popularity
asterisk Asterisk 4.3 Smile 4.5 Visitors
65%   Popularity on the site
CallWeaver No rating No rating
10%   Popularity on the site
FreeSwitch logo FreeSwitch No rating No rating
22%   Popularity on the site
kamailio Kamailio 3.3 Smile 4.7 Visitors
40%   Popularity on the site
Kannel Kannel 3.8 Smile No rating
31%   Popularity on the site
SER No rating No rating
6%   Popularity on the site
Trixbox No rating No rating
11%   Popularity on the site
XiVO XiVO 3.8 Smile 4.5 Visitors
0%   Popularity on the site
Yate No rating No rating
7%   Popularity on the site
sipXecs No rating No rating
7%   Popularity on the site