https://f-droid.org/en/packages/org.avmedia.gshockGoogleSync/
Casio G-Shock Smart Sync | F-Droid - Free and Open Source Android App Repository
Add smart functions to your Casio square BT G-Shock Watch.
casio g shocksync f droidfree
https://f-droid.org/packages/com.etesync.syncadapter/
EteSync - Secure Data Sync | F-Droid - Free and Open Source Android App Repository
Secure, private and end-to-end encrypted calendar, contacts and tasks sync
sync f droidetesync secure
https://f-droid.org/en/packages/org.handmadeideas.floccus/
floccus bookmark sync | F-Droid - Free and Open Source Android App Repository
Sync your bookmarks privately across browsers and devices
floccus bookmark syncdroid
https://f-droid.org/en/packages/top.stevezmt.calsync/
CalSync - Notification Calendar Sync | F-Droid - Free and Open Source Android App Repository
Sync notification time info to calendar automatically
sync f droidopen sourcefree