The first pen is the Gama Airborne XT with a Schmidt nib unit. It is inked with a Sudhir Kalyanikar special violet ink made by mixing two Camel Inks - so I call the ink Camel Violet.
The second pen is the Gama Revolution with a Jowo 1.1 mm stub nib. This is inked with a Chinese Blue-Black ink of the GZ Boss brand.
From what I could find, this ink is made by the Guizhou Boss Enterprise (Guiyang Boss Chemical Industry Co., Ltd.).
They make two types of inks - LaoBan & Yingkesi. Based on the description I found online, I believe this is the Yingkesi blue-black fragrant ink.
A Jinhao 303 with Bril Green ink. This pen has a "Ganesh" and an "OM" motif. Currently being used by Sonali Kalyanikar.
Currently inked: Pen from the Eternal Gandhi brand inked with Waterman Brown ink. Nice brown ink matches the pen pattern.