Don't link directly to binaries in cases where a proper homepage for the assembler is available.
These are tools that can be used to transfer code that has been assembled on a PC/Mac and execute it on the C64 without forcing the user to store the contents on a C64 disk first.
Although a lot of tools are available on CSDb, there are also a number of tools on the list maintained by Fairlight that are not available on CSDb.