Your problem description, both here and in your other question, is unclear on certain critical details. That said, I suspect that your problem isn't with GRUB per se, but with either a buggy firmware in your computer or a mistaken installation of Ubuntu in BIOS/CSM/legacy mode on an EFI-based computer. (A side comment: Modern computers don't have BIOSes, no matter what manufacturers may say. They use the Extensible Firmware Interface [EFI], which is a replacement for the 30-year-old BIOS. See Adam Williamson's blog post for more on this topic. Confusingly, most EFIs include a compatibility mode that lets them boot using old BIOS boot loaders. This feature, intended to help in the transition from BIOS to EFI, is actually causing problems, because many Linux distributions can boot and install in either mode.)
Since you're asking about alternatives to GRUB 2, though, I'll say that there are several. Briefly, options for Linux include:
- GRUB 2 -- This is what Ubuntu uses by default.
- GRUB Legacy -- Fedora released a patched version of GRUB Legacy that includes EFI support. It's no longer being maintained by Fedora, but it still works, and it has the advantage of being easier to configure than GRUB 2.
- ELILO -- This is, AFAIK, the oldest EFI boot loader for Linux. It's similar to the BIOS-mode LILO. It's strictly a boot loader, not a boot manager, which means you can boot any Linux kernel you like, but you can't chainload from ELILO to another OS.
- SYSLINUX -- Recent versions of this boot loader include EFI support. Like ELILO, SYSLINUX is a boot loader but not a boot manager.
- EFI stub loader -- Kernels since 3.3.0 include their own boot loader, which means that the kernel looks like an EFI application to the firmware, enabling you to boot it directly or via a boot manager (see below).
- gummiboot -- This program is a boot manager but not a boot loader. It relies on the EFI stub loader to actually launch the kernel. It's designed to be lightweight and simple.
- rEFIt -- Popular on Macs, this is a graphical boot manager, but it was written before the EFI stub loader made an appearance and so is awkward to use with it. It's no longer being maintained (but see below).
- rEFInd -- I took rEFIt and expanded it to include explicit support for the EFI stub loader, as well as many other new features. In essence, rEFInd is a currently-maintained version of rEFIt.
For more on these programs, see my page on EFI boot loaders for Linux, which describes all of these in more detail. Some of these programs are available in the Ubuntu archives, but others aren't. If you believe any of them should be included as alternatives to (or even replacements for) GRUB 2, you'd do better to file a bug report than to post about it here.