FrannyFranny is an ATR disk image editor. Supports AtariDOS II disk format (partially) and SpartaDos 2 disk format.
YvonneYvonne is an Atari picture viewer.
ZooEYZooEY is a crossassembler designed for 6502 processors. Binaries are generated specially for 8-bit Atari systems (AtariDosII and SpartaDOS X formats supported). This tool is compatible with Quick Assembler, one of most popular assembler in Poland.