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Move from alert to fix before users notice. AppSignal monitors errors, performance bottlenecks, host health, and uptime—all from one dashboard. Instant notifications on deployments, anomaly triggers for memory spikes or error surges, and seamless log management. Works out of the box with Rails, Django, Express, Phoenix, Next.js, and dozens more. Starts at $23/month with no hidden fees.
uHex is a simple and fast, multiplatform hex editor. It's primarily written for DOS, but compiles on POSIX just as well. uHex has been written with care to work fast even on an 8086 CPU, providing support for large files (up to 2 GiB) while using minimal amounts of memory. "uHex" stands for "micro Hex" (it should actually be spelled µHex, but DOS operating systems do not allow non-ASCII symbols in filenames, thus the official name became just "uHex").
BEYE (Binary EYE) is a free, portable, advanced file viewer with built-in editor for binary, hexadecimal and disassembler modes. It contains a highlight AVR/Java/i86-AMD64/ARM-XScale/PPC-64 and other disassembler, full preview of MZ,NE,PE,ELF and other.
lde is a disk editor for linux, originally written to help recover deleted files. It has a simple curses interface that was supposed to resemble an old version of Norton Disk Edit for DOS. Works well with ext2, minix, xiafs. Not so hot w/fat and iso9660