| Clavister | 4 | 6 |
| Claws Mail | 1 | 1 |
| Claws-Mail | 3 | 9 |
| Claxon Project | 1 | 1 |
| Claydip | 1 | 1 |
| Claymore Dual Miner Project | 1 | 3 |
| Claymore Systems Inc | 1 | 2 |
| Clbox | 1 | 1 |
| Clean-Contact Project | 1 | 1 |
| Cleanersoft | 1 | 3 |
| Cleaninternet | 1 | 1 |
| Cleantalk | 4 | 9 |
| Clear | 6 | 11 |
| Clearbudget | 1 | 1 |
| Clearfishing | 2 | 2 |
| Clearhub | 1 | 1 |
| Clearswift | 6 | 30 |
| Clearswift Limited | 1 | 2 |
| Clemens Wacha | 1 | 2 |
| Clementine-Player | 1 | 3 |
| Cleo | 1 | 2 |
| Clerk | 2 | 2 |
| Clevelandwebdeveloper | 1 | 2 |
| Clever | 2 | 2 |
| Clever Components | 2 | 2 |
| Clever Copy | 1 | 13 |
| Clever-Cloud | 1 | 1 |
| Cleverpath | 2 | 2 |
| Cleverplugins | 2 | 2 |
| Cleversoft | 1 | 3 |
| Clevertap | 1 | 1 |
| Cli Project | 1 | 1 |
| Click Project | 1 | 1 |
| Click-2 | 1 | 1 |
| Click-Ranker | 1 | 1 |
| Click-Reminder Project | 1 | 1 |
| Click2Learn | 1 | 1 |
| Click2Sell | 1 | 2 |
| Click5Interactive | 1 | 2 |
| Clickbank | 1 | 1 |
| Clickbar | 1 | 1 |
| Clickdatos | 1 | 1 |
| Clickdesk | 2 | 2 |
| Clickfraud-Monitoring | 1 | 1 |
| Clickfunnels | 1 | 2 |
| Clickhouse | 3 | 10 |
| Clickhouse-Driver Project | 1 | 1 |
| Clicknet | 1 | 1 |
| Clickstudios | 1 | 13 |
| Clicktech | 6 | 12 |
| Clicktotweet | 1 | 2 |
| Clicshopping | 1 | 1 |
| Client | 1 | 1 |
| Client Logo Carousel Project | 1 | 1 |
| Clientexec | 1 | 3 |
| Clientresponse Project | 1 | 1 |
| Clientsoftware | 2 | 3 |
| Climaxthemes | 1 | 1 |
| Cling Project | 1 | 1 |
| Clinical-Genomics | 1 | 4 |
| Cliniccases | 1 | 4 |
| Clio | 1 | 2 |
| Clip-Bucket | 1 | 13 |
| Clip-Share | 1 | 7 |
| Clipboard Project | 1 | 1 |
| Clipcomm | 2 | 2 |
| Clipper Project | 1 | 1 |
| Clippercms | 1 | 10 |
| Clipr | 1 | 1 |
| Clipsoft | 1 | 6 |
| Cliquemania | 1 | 1 |
| Cliserv | 1 | 1 |
| Clivedelacruz | 1 | 3 |
| Clixint | 1 | 2 |
| Cloak Front End Email Project | 1 | 1 |
| Cloakcoin | 1 | 1 |
| Clockwork Web Project | 1 | 1 |
| Clockworkmod | 1 | 2 |
| Clogica | 4 | 9 |
| Clojure | 1 | 1 |
| Clone2009 | 1 | 2 |
| Cloneforest | 1 | 1 |
| Clonemonster | 1 | 1 |
| Clonos | 1 | 2 |
| Clonos Project | 1 | 1 |
| Clonuswiki | 1 | 1 |
| Clorius Controls A/S | 1 | 1 |
| Closed-Loop | 1 | 1 |
| Closeprotectionworld | 1 | 1 |
| Closure-Compiler-Stream Project | 1 | 1 |
| Closurecompiler Project | 1 | 1 |
| Cloud | 1 | 1 |
| Cloud Foundry | 5 | 36 |
| Cloud Manager Project | 1 | 1 |
| Cloud4Wi | 1 | 1 |
| Cloudacl | 1 | 1 |
| Cloudavid | 1 | 1 |
| Cloudbase | 1 | 2 |
| Cloudbees | 2 | 12 |
| Cloudberrylab | 1 | 1 |
