AbuseIPDB - AbuseIPDB is an IP address blacklist for webmasters and sysadmins to report IP addresses engaging in abusive behavior on their networks, or check the report history of any IP.

Free File Splitter - File Splitter is a handy freeware program which allows to easily split and merge files

Metadefender - Metadefender, by OPSWAT, allows you to quickly multi-scan your files for malware using 43 antivirus...

HJSplit - HJSplit is a popular set of freeware file-splitting programs created by Freebyte.

Joe Sandbox - Automated Malware Analysis - Development and Licensing of Automated Malware Analysis Tools to Fight Malware

Batch File Split & Join - Split and merge multiple text or binary files in either character, line, or byte modes. When splitting files, you can split on certain text or binary separator; target given number of parts; or target specific part size. Join files on lines/bytes.