Assembly - I know assembly from several processors, but I
can say I'm proficient only with the following:
Texas Instrument's DSPs (mostly TMS320C5xx)
The old Zilog Z80
I've also used several MicroController's, in the sense that I know
the architecture and integrated peripherals.
Java - I wrote some Java code at Google, although I'm not a skilled
Java programmer. Long ago I've helped create a large Tomact-based
webapp for Fiere Mostre, mainly in deployment
and production systems, with minor development work for user authentication,
security and database access. I've also done profiling, optimization and
performance tuning work for a POS application based on IBM's JPOS.
Extensive customizations to Bugzilla for internal use
PHP: I've taught PHP in a web programming course as part
of my TeacherRole. I've also written an online shop application
in PHP back when PHP4 was not yet mainstream and you had to build it from source.
As part of my ManagerRole, I've also coordinated two additional PHP projects
Python: I use Python occasionally for scripting and small webapps.
See GeekiGeeki for an example of my limited Python programming skills.