| Claris | 3 | 18 |
| Claroline | 1 | 22 |
| Claromentis | 1 | 1 |
| Clash Project | 1 | 5 |
| Clashforwindows | 1 | 1 |
| Class | 1 | 1 |
| Class-1 | 2 | 3 |
| Class-transformer Project | 1 | 1 |
| Classapps | 1 | 3 |
| Classcms | 1 | 3 |
| Classcms Project | 1 | 3 |
| Classified-software | 1 | 1 |
| Classifiedphpscript | 1 | 1 |
| Classifieds Caffe | 1 | 1 |
| Classroombookings | 1 | 2 |
| Classweb | 1 | 1 |
| Classyfrieds Project | 1 | 1 |
| Clastix | 2 | 4 |
| Claudio Klingler | 1 | 5 |
| Claudio Matsuoka | 1 | 3 |
| Claus Due | 1 | 1 |
| Clausmuus | 1 | 2 |
| Clausvb | 1 | 2 |
| Clavister | 4 | 12 |
| Claws Mail | 2 | 2 |
| Claws-mail | 3 | 34 |
| Claxon Project | 1 | 1 |
| Claybird | 1 | 1 |
| Claydip | 1 | 1 |
| Claymore Dual Miner Project | 1 | 4 |
| Claymore Systems Inc | 1 | 2 |
| Clbox | 1 | 1 |
| Cleanersoft | 1 | 3 |
| Cleaninternet | 1 | 1 |
| Cleantalk | 3 | 7 |
| Clear | 4 | 4 |
| Clearbudget | 1 | 1 |
| Clearfishing | 2 | 2 |
| Clearhub | 1 | 1 |
| Clearswift | 6 | 19 |
| Clearswift Limited | 1 | 19 |
| Clemens Wacha | 1 | 2 |
| Clementine-player | 1 | 3 |
| Cleo | 2 | 3 |
| Clever | 1 | 1 |
| Clever Components | 2 | 2 |
| Clever Copy | 1 | 8 |
| Cleverpath | 2 | 80 |
| Cleverplugins | 1 | 2 |
| Cleversoft | 1 | 2 |
| Cli Project | 1 | 10 |
| Click Project | 1 | 1 |
| Click-2 | 1 | 2 |
| Click-ranker | 1 | 1 |
| Click2learn | 1 | 2 |
| Click2sell | 1 | 2 |
| Clickbank | 1 | 1 |
| Clickbar | 1 | 1 |
| Clickdesk | 2 | 2 |
| Clickfraud-monitoring | 1 | 1 |
| Clickhouse | 1 | 21 |
| Clickhouse-driver Project | 1 | 1 |
| Clicknet | 1 | 1 |
| Clickstudios | 1 | 13 |
| Clicktech | 6 | 12 |
| Client | 1 | 3 |
| Clientexec | 1 | 3 |
| Clientresponse Project | 1 | 1 |
| Clientsoftware | 2 | 3 |
| Clinical-genomics | 1 | 2 |
| Cliniccases | 1 | 4 |
| Clip-bucket | 1 | 13 |
| Clip-share | 1 | 7 |
| Clipboard Project | 1 | 1 |
| Clipcomm | 2 | 2 |
| Clipper Project | 1 | 2 |
| Clippercms | 1 | 10 |
| Clipsoft | 1 | 6 |
| Cliquemania | 1 | 1 |
| Cliserv | 1 | 1 |
| Clixint | 1 | 2 |
| Cloakcoin | 1 | 1 |
| Clogica | 4 | 9 |
| Clone2009 | 1 | 5 |
| Cloneforest | 1 | 1 |
| Clonemonster | 1 | 1 |
| Clonos | 1 | 3 |
| Clonos Project | 1 | 3 |
| Clonuswiki | 1 | 1 |
| Clorius Controls A/s | 1 | 1 |
| Closeprotectionworld | 1 | 1 |
| Closure-compiler-stream Project | 1 | 1 |
| Closurecompiler Project | 1 | 1 |
| Cloud Foundry | 38 | 213 |
| Cloud Native Computing Foundation (cncf) | 1 | 4 |
| Cloud-hypervisor | 1 | 1 |
| Cloud-init | 1 | 7 |
| Cloud4wi | 1 | 1 |
| Cloudacl | 1 | 1 |
| Cloudavid | 1 | 1 |
