Similar to PuTTY
IPython
IPython
IRAF
IRAFIrrlicht Engine
Irrlicht EngineIspell
Ispell
Iw (Linux)
Jabber
Jahshaka
Jaspersoft BI
Jcode.pl
JEdit
JEditJekyll
Jekyll (software)Jigdo
JigdoJOnAS
Jq (プログラミング言語)
JRuby
JRuby
JSDoc
JSDocJuK
JuK
Jython
JythonKAlarm
KAlarm
Kali Linux
Kali Linux
Kate
Kate (text editor)KaTeX
KaTeX
Kawa
Kawa (Scheme implementation)KBabel
KCharSelect
KColorEdit
KColorEditKControl
KDE
KDE