Android
7
Apple's OS
4
Commodore's OS
6
DOS/360
25
Linux
99
Microsoft's OS
50
Mixed
13
Other
72
RTOS
36
Unix based
424
Unspecified
12
Academic Free License
3
Affero License
1
Apache Software License
10
Apple Source License
19
BSD License
40
CDDL
4
GNU General Public License
289
MIT License
6
Open Source License
17
Propietary software
223
Public Domain
23
Various licenses
104