Description from the publisher
BatchIt! is a free text file splitting utility. Very large text files (eg. > 65,000 rows) often cannot be imported into applications such as Excel, Access, etc. BatchIt! allows large text files (.txt, .csv, etc.) to be split into smaller files with or without a header row.
The unregistered version is limited to 5,000 rows in total per Source File. There is no time limit on unregistered version usage.
Registration is free and instant (via web site).