Meristogenys orphnocnemis — Northern Torrent Frog
This is your basic medium-sized brown jumpy forest frog, typically found on the ground or perched on rocks or vegetation very close to the ground.
The third one here looks enough different to me (bigger eyes, shorter and rounder snout) that I'm a bit suspicious that it's a different Meristogenys species. But only a bit.
For variety, here's a couple on brown perches rather than green perches.
- Inger, R. F., Stuebing, R. B., Grafe, T. U., Dehling, J. M. 2017. A Field Guide to the Frogs of Borneo, Third Edition
- Malkmus, R., Manthey, U. Vogel, G., Hoffmann, P., & Kosuch, J. 2002. Amphibians & Reptiles of Mount Kinabalu (North Borneo)