acgtools is a driver for the ACG HF MultiISO RFID reader written entirely in Python and including several developer tools, including EEPROM backup/edit/restoration for enabling some of the more exotic features supported by this hardware. There are also sample applications, notably an e-Passport reader.
autober is a language for generating BER decoders. It's different from an ASN.1 compiler in that it's much simpler and it only deals with BER-encoded messages. It is intended for smart card and RFID applications where much of the data stored on these devices is, in-fact, BER-encoded TLV data. The language is designed to be very similar to the template definitions found in the specifications for smart card and RFID applications.
ccid-utils is a USB smartcard driver and development platform. The driver follows a simple synchronous design that supports multiple slots but only one transaction at a time and includes a Python interface. It also includes a command line smartcard shell with a searchable history. The shell, written in Python, offers many useful features for developing with smart-cards and for reverse engineering APDU formats. It includes tools for reading data from GSM SIM cards and EMV credit/debit cards. The SIM tool is very basic, but allows reading SMS messages from the SIM. An example EMV (credit/debit) card tool is included that is boilerplate code for utilizing the EMV C API. There is also a Python interface for the EMV API. A graphical interface for reading EMV cards is provided.
ScaraOS is a 32-bit, multiboot-compliant, monolithic OS kernel. It has the beginnings of a paged VM system and VFS. It supports PCI, DMA, AT floppies (read only), EXT2, and can do all the low-level stuff expected of an OS kernel (program the PIC, handle interrupts, control the timer, etc.). It was written primarily to learn OS fundamentals. It boots using any multiboot bootloader, and it has been tested with grub on qemu and KVM. Bootable floppy images are available.