Toad For Oracle Freeware V12.12 -64-bit- 'link' -

: It aligns with 64-bit Oracle Clients and operating systems, reducing the "mismatch" errors often seen with 32-bit software on newer machines. Key Features in v12.12

Toad (Tool for Oracle Application Developers) by Quest Software is the industry-standard IDE for Oracle database administration and development. The edition is a reduced-capability version intended for lightweight use.