also, YakYak exists, it's a desktop client for Google Hangouts, supports linux, and is open source
data:
| type | amount |
|---|---|
| VoIPs | 37 |
| web | 7 |
| open source | 16 |
| proprietary | 21 |
| linux support | 21 |
| no linux support | 16 |
| target demo | amount |
|---|---|
| social | 15 |
| gamers | 10 |
| workplace | 12 |