zip file

Scan audio files and get error reports.

Find which apps are keeping files locked.

Encryption software to encrypt or decrypt files

Zipeg is free universal .rar and .zip file opener.

Zip, unzip, encrypt, and share files.

File archiver.

File and folder comparison and synchronization.

File backup and sharing tool; 15 GB free.

File appending utility supports several formats.

File copy and backup application.