A warning for OP3/3T/5/5T users:

Future versions from Arnova8G2 and Skulshady will likely require the front camera fix that enables all features for the front camera.

OP3/3T front camera fix: https://www.celsoazevedo.com/files/android/google-camera/op3fix/
OP5/5T: https://forum.xda-developers.com/oneplus-3t/themes/mod-camera-hdr-fix-t3742366

Update from Arnova8G2:

GoogleCamera-Pixel2Mod-Arnova8G2-V5.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk100

(OnePlus users: this requires the front camera fix)

Updates from SKULSHADY:

skulshady_gcam_5.1.018_Mod_Full_Auto.apk (no config needed)
https://www.celsoazevedo.com/files/android/google-camera/#apk103

skulshady_gcam_5.1.018_Mod_Manual.apk (with manual focus)
https://www.celsoazevedo.com/files/android/google-camera/#apk102

skulshady_gcam_5.1.018_Mod_v2.0.apk (normal app)
https://www.celsoazevedo.com/files/android/google-camera/#apk101


(OnePlus users: this requires the front camera fix)

Update from BSG:

MGC_5.1.018.177470874.41362666_MI6_1.0-beta.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk104

Update from BSG:

Based on a old Google Camera version. Android 6+.

MGC_3.2.45_A6.0H_MI6_MIMix
https://www.celsoazevedo.com/files/android/google-camera/#apk111

Update from Arnova8G2:

Beta version, testing an option the disable all hdr+ related features for the front camera (eg: for OnePlus phones without the front camera fix). Go to Settings > Advanced, turn the "Disable front HDR+" ON, and restart the app.

There's also a new "Improved Sharpness" setting.

GoogleCamera-Pixel2Mod-Arnova8G2-V6-Beta
https://www.celsoazevedo.com/files/android/google-camera/#apk112

Update from UriKill:

- He's a new developer on this page.
- Posts on 4PDA.
- Lot's of options. If some devs want to remove lot's of options, this guy adds them all.
- Check the changelog for more info.

UriKill_MGC_5.1.018_FinalMOD_All_Inc.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk113

Update from miniuser123:

Optimised for Samsung/Exynos.

GCam_5.1.018.177470874.41362666__SG7Exy_V5.apk:
https://www.celsoazevedo.com/files/android/google-camera/#apk114

Update from Arnova8G2:

GoogleCamera-Pixel2Mod-Arnova8G2-V6-Beta2.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk115

Update from BSG:

GC_3.2.045_Mi6_MiMix_final.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk116

Update from Arnova8G2:

- Black screen fix: Go to Settings > Advanced, turn the "Disable front HDR+" ON, and restart the app.
- (OnePlus) While not needed, the front camera fix is recommended.


GoogleCamera-Pixel2Mod-Arnova8G2-V6-Beta3.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk117

Updates from cstark27:

cstark27_GCam_5.1.018_24_v3.3.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk119

cstark27_GCam_5.1.018_24_wide_v3.3.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk118

Update from miniuser123:

Optimised for Samsung/Exynos.

GCam_5.1.018.177470874.41362666__SG7Exy_V6.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk120

Update from Arnova8G2:

- Final V6 will support more than 20 devices.
- So far Arnova posted 15 v6 betas, but because changes are small or device specific I "ignored" all apks since beta 3.
- This is the latest beta (v6-beta15) and includes all changes since v6-beta3.
- If you're using v6-beta3, upgrade to this version as it fixes many bugs.

GoogleCamera-Pixel2Mod-Arnova8G2-V6-Beta15.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk121

Update from miniuser123:

Optimised for Samsung/Exynos.

GCam_5.1.018.177470874.41362666__SG7Exy_V7.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk122

Updates from cstark27:

cstark27_GCam_5.1.018_24_v3.4.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk125

cstark27_GCam_5.1.018_24_wide_v3.4.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk124

cstark27_GCam_5.1.018_24_wide_v3.4_G6Lineage.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk123

Updates from cstark27:

cstark27_GCam_5.1.018_24_v3.4.1.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk126

Update from BSG:

(Based on the older Google Camera 3.2.)

GC_3.2.045_Mi6_MiMix_final_1.1.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk127

New versions by Tolyan009:

APKs from XDA/4PDA user "Tolyan009". Based on BSG's work. Adds some features (eg: slow shutter) and tries to improve the app stability.

MGC_5.1.018_v2e_tolyan009_aemode_exif_fix.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk130

MGC_5.1.018_v2e_tolyan009_aemode_front_180.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk129

gcam_3.2.045_stable_op3-t_tolyan009.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk128

Updates from cstark27:

cstark27_GCam_5.1.018_24_v3.5.apk
https://www.celsoazevedo.com/files/android/google-camera/#apk132

cstark27_GCam_5.1.018_24_wide_v3.5.apk (wide camera)
https://www.celsoazevedo.com/files/android/google-camera/#apk131