KolibriOS

KolibriOS was forked from MenuetOS, a similar operating system that was built in 32-bit and 64-bit editions. It attracted much popularity in Russia and a number of other countries in the region, leading to a community contributing to the project. KolibriOS on the other hand has only been developed in 32-bit and remains open source. There are two development branches: KolibriACPI, which has extended ACPI support, and Kolibri-A, an exokernel version of KolibriOS optimized for embedded applications and hardware engineering; only few AMD APU-based platforms are currently supported. == Features ==

Due to its small size (most distributions will fit on a single 1.44 MB floppy disk image) and being written in assembly, the OS boots in only a few seconds on various devices. It has support for booting from NTFS, Ext2/3/4, FAT12/16/32, exFAT, and ISO9660 based disks and can also boot from Coreboot and Windows. KolibriOS has a graphical user interface based on, and optimised for VESA. It features pre-emptive multitasking, streams, and parallel execution of system calls. It has built-in application software (with more than 250 packages) such as a word processor, image viewer, music player, and web browser, as well as a code editor with an integrated macro assembler (FASM). KolibriOS features a shell supporting various common commands used on Unix-like systems. == Supported hardware ==

USB 1.1 and 2.0 are supported (UHCI, OHCI and EHCI). There is also support for USB hubs, although the only USB HID devices supported include keyboard, mouse and USB flash drives. Internal hard disks with PATA/IDE and SATA/AHCI interfaces are supported natively. Supported file systems include FAT12, FAT16, FAT32, ext2, ext3 and ext4 (partially), NTFS (no extended functions such as encryption), read-only exFAT, XFS, CDFS (including multisession). KolibriOS supports the full TCP/IP stack and certain Ethernet network cards.) • 8 MB of RAM • VESA-compatible graphics card • 1.44 MB 3.5" floppy drive, hard disk drive, USB flash drive or CD-ROM drive • Keyboard and mouse (COM, PS/2 or USB) == Reception ==

In a 2009 review piece on alternative operating systems, TechRadar called it "tremendously impressive", noting its performance and streamlined codebase. == References ==