MOS Technology, as part of Commodore, enhanced their KIM-1 offering with a range of add-on products.
Under the name KIM System Products hardware such a Motherboard (KIM-4), Memory expansions(KIM-2, 3, 3B) and software like the Cross Assembler, the KIM-5 Resident Assembler/Editor, and KIMath.

• KIM-1

• KIM-2 KIM-3
• KIM-3B
• KIM-4
• KIM-5
• KIM-5 Resident Assembler/Editor

• KIMath
• TIM
• Cross Assembler

KIM System products folder including pricelist

The Cross-Assembler was used at MOS Technology to create the very first 6502 code, like the KIM-1 ROMs or the TIM ROM (MCS6530-004).

Cross Assembler

Cross assembler Manual, GE timeshare

KIMath package
See also the KIM-5 page for KIMath provided as 6540 ROM for the KIM-5 ROM baord.

	KIMATH and MATHPAC KIMATH is a floating point package, 16 digit precision for the KIM-1 6502 system. Original MOS Technology listings, binary, documents in PDF and text format, sources. MATHPAC is a supplement by John Eaton, Dr Dobbs nr 20, to aid in using KIMATH. Original article in PDF and text format with sources and binaries.
	MOS KIMath Subroutines Programming Manual