iMyFone iTransor for WhatsApp - iMyfone iTransor for Whatsapp is the best transfer tool which can help you transfer Whatsapp cross-device.
Wide Angle Contact Transfer - Contact Transfer- easily manage contacts between iPhone, Android & PC with this Windows software. Transfer contacts directly between devices and edit them from your PC!
iMazing - iMazing lets you transfer music, files, messages, apps and more from any iPhone, iPad, or iPod to a computer, Mac or PC. Manage and backup your iOS device simply without iTunes. (was DiskAid)
SMS Backup+ - Backup Android SMS, MMS and call log to Gmail / Gcal / IMAP - jberkel/sms-backup-plus
Syncios WhatsApp Transfer - Syncios WhatsApp Transfer is both phone to phone WhatsApp transfer and WhatsApp backup and restore tool. It not only supports to transfer WhatsApp chats iOS and Android devices, but also supports backing up your WhatsApp data to PC and restore .
oandbackup - Make backups of selected apps on your device and restore from those backups.