Our website provides a free download of 8051 Workbench 1.0. This free program was originally developed by Ansys, Inc. 8051 Workbench is developed for Windows XP/Vista/7/8/10 environment, 32-bit version. The software is included in Development Tools. Commonly, this program's installer has the following filenames: runwb2.exe and workbnch.exe etc. The most popular versions among the software users are 12.0 and 1.0.
From the developer:
The 8051 Workbench provides a unified interface to a series of user-replaceable programs, including an assembler (A51.
You may want to check out more software, such as IAR Embedded Workbench for 8051, mikroBasic PRO for 8051 or mikroC PRO for 8051, which might be similar to 8051 Workbench.