This is a compilation of many different misc solutions available. It is not exhaustive. If you don't find what you want, search for it.
Please do not post questions in this thread looking for a solution that is not listed. Use other threads for that.
Please do post other good known similar solutions in this thread. I will try to incorporate any posted solutions into the list. Otherwise, users can read the thread for any other solutions.
AMD Enabler - Read this
Battery meter - For laptops, enable battery meter, read this
Boot OSX from a Pendrive - Read this
Cardbus/PCMCIA ControllerClone your hard drive - Get app here
DVD Player function on SSE2 in Tiger - See this
Hiding Files like mach_kernel - Read this.
iTunes Removal - Read this
JMicron IDE patch for 10.4.8 DVD - Member thedguy created a PPF patch to the JaS 10.4.8 Intel SSE3 Only Reseed DVD to allow it to boot on JMicron IDE drives. Find it on the Demon (OSX 10.4.8 Jmicron JMB IDE patch) and read about it here.
Laptop lid - close and no sleep - Use insomnia.kext here
Laptop too HOT - Read this
MacDrive - can't find your partition. Be sure you have updated to latest version. If you run or have deleted either Daemon Tools or Alcohol 120%, then there is a little file that is interfering with MacDrive. Even if you deleted the 2 apps, the file is left behind. Find SPTD.SYS file in C:\Windows\System32\Drivers and rename it to something like SPTD.SYS.OLD and reboot. Doing this might interfere with mounting virtual drives. If you need to mount the virtual drive, rename the SPTD file to its original name and reboot. This will again interfere with MacDrive. Stuck with only one of two features at a time.
Power Management - see Battery Meter above
Reboot fix - Computer hangs when it reboots, then read this
SMB/AFS (Samba/AppleFileSharing) fix - For 10.4.7 and maybe 10.4.8. If you can't access Windows shares or Apple shares, try this
nForce (ATA and SATA) - driver by MeDevil
nForce4 - Driver source and an older thread, newer, newer, and newest. Also, Beta effort by bikedude880
Silicon Image PCI card - Read this
VIA - How to install on a system with VIA SATA. Read this
USB replug - If you suffer from having to replug your USB devices on every boot, read this.
USB2 - Read this. Versions for 8.4.1 kernel and 8.8.1 kernel by orByte.
VMWare - gives the error "Virtual machine kernel stack fault (hardware reset)". Read this.
Windows - Hide the Partition - (No salami) Read this or this.
Windows - Mount the Partition - stop the Initialize messages. Read this.