Withdata Software provide some ETL (Extract-Transform-Load) tools for SQL Server:
TxtToSql Load TXT, CSV, TSV data to SQL Server
XmlToMsSql Transform XML data to SQL Server
JsonToMsSql Transform JSON data to SQL Server
XlsToSql Extract data from Excel to SQL Server
AccessToMsSql Extract Access data to SQL Server
DB2ToMsSql Extract DB2 data to SQL Server
MysqlToMsSql Extract MySQL data to SQL Server
OracleToMsSql Extract Oracle data to SQL Server
PostgresToMsSql Extract PostgreSQL data to SQL Server
SqliteToMsSql Extract SQLite data to SQL Server
MsSqlCopier Extract data from one SQL Server database to another