IBM, Google, Red Hat kunye neFacebook yiza kunye ngenxa yeelayisensi zemithombo evulekileyo. Ezi zigebenga zibhengeze ukuba zijolise ekukhuthazeni ukuqikelela okukhulu kweelayisensi zemithombo evulekileyo, ukuzibophelela ekwandiseni amalungelo ongezelelweyo okulungisa iimpazamo zokuthobela. Yonke into entle eya kuthi izuze zonke iiprojekthi ezichaphazelekayo lolu hlobo lweelayisensi zemithombo yasimahla okanye evulekileyo kwaye ngamanye amaxesha azinazo iziqinisekiso ekufuneka bezenzile kwaye ke le quartet inamandla iya kutyalwa ukuze inyanzelise.
Ilayisensi edumileyo I-GNU GPL (iLayisensi kaRhulumente Jikelele) Yenye yezona zisetyenziswa kakhulu namhlanje, kunye ne-LGPL (okanye i-GPL encinci) yeeprojekthi zesoftware yasimahla. Ngaphaya koko, njengoko sisazi, i-GPL yeyona isetyenziswa kuninzi lwe-Linux kernel (ngaphandle kwabo baqhubi balayishwe njengeemodyuli kwaye banokuba phantsi kwezinye iilayisenisi, ukuquka ezizezemnini kwabo baqhubi sibabiza ngokuba zii-binary blobs) kwaye kwakhona ye GPL.inkqubo ye GNU eseleyo eyenza unikezelo lwethu, ukuquka uninzi lweepakethe zesoftware ezisetyenziswa kuzo. Ngenguqulelo yokuqala neyesibini yeGPL amathuba athile ayengekho, kodwa ngenguqulo yesi-3 yeGPL (GPLv3Ewe, isindululo sokupheliswa esidibeneyo sibandakanyiwe sanika abasebenzisi amandla okulungisa iimpazamo ekuthobeleni iilayisensi. Oku kubonelele ngendlela efanelekileyo kwiimpazamo kunye neebugs ezazidla ngokungaqwalaselwa, zivumela ukuthotyelwa kwelayisensi kunye nokuhambelana nemigangatho yoluntu.
Ewe, i-IBM, uGoogle, iRed Hat kunye noFacebook bazibophelele ekwandiseni indlela ye-GPLv3 kwiimpazamo zokuthobela iilayisensi zekhowudi yesoftware enelayisensi nganye phantsi kwezinye iinguqulelo ezinje GPLv1, GPLv2, GPLv2.1. Ukuba unomdla wokufunda ngakumbi ngesi sihloko, unokufunda amaphepha ahlukeneyo ngolwazi malunga nalo: