Welcome - These icons use subtle code language to show the "coming together" of parts and people to collaborate. They are perfectly suited for app/favicons as well.
We love #124, the dark background is a great touch. Some of the feedback we've received though is that the icon comes off as a bit feminine. Is there a way to make it a bit more masculine, perhaps lowering the weight of icon font or something along those lines.
please disregard my comment, I hadn't seen #126 & #127 before sending it. They are even better. The concept of human collaboration is really appealing, however it isn't immediately apparent that it represents people. Is there a way to make it slightly more distinct.
Also, we like the flat background of #124 more then the glow affect in #126 & #127
Sorry for the delayed feedback. Had to travel unexpectedly. These are really great. Would you mind doing #154 on a light background just so we have an idea how it would look if the situation presented itself?