Prompt 2 by Panic - The best SSH client for iOS
Dataplicity - Dataplicity is a remote terminal for your Pi.
FTPloy - Easy continuous deployment for everyone
Websecurify - Websecurify free and premium security tools automatically scan websites for vulnerabilities like SQL Injection, Cross-site Scripting and others
Commander One - Free dual-pane file manager for Mac with PRO Pack of features.
Strongsync - Dropbox-like Sync and Backup using only SFTP or Amazon S3