Kairos 
Kairos is a weather graphing
and monitoring application for Mac OS X. Kairos records the weather
conditions for any location you specify and graphs the data.
In addition Kairos can monitor the temperature and send out warning
emails if it detects the conditions are becoming icy.
Fantasm/LIDE
Fantasm is a Macintosh 68K and
PowerPC/Altivec assembly language development environment. It
has been designed to make writing either 68K or PowerPC assembly
language programs as easy as possible.
The assembler provides what's been described as an "awsome" macro processor making life easy for the seasoned programmer, whilst its large range of documentation, syntax colouring/hyper jumping editor and helpful error message enable the newcomer to assembly language to get up to speed faster.
It can also produce applications from C and C++ via Apple's MrC compiler.
We believe Fantasm is one of the most powerful assemblers ever written; but see for youself - follow the link to get more details, documentation, and to try it yourself.
LXT
LXT is a 68K to PowerPC cross
translator for use with Fantasm. LXT will take a 68K assembly
language project and automatically translate it to a PowerPC
executable or fragment, including Operating System calls.
Version 2 offers improved PowerPC code generation and the ability to generate code to check every read/write operation at runtime, thus ensuring outstanding quality assurance.