Create your own Atari tapes
Software development for 4Mb portable, using Z80 CPU and AA batteries
Search and manage batches of D64/etc files.
Graphical SFTP client and terminal emulator with helpful utilities
Ric & Ry Remote Protocol
An 8 bit emulator created on the scratch, including an assembler.
Java-based instruction level emulator of MSP430. Code on github.