Tray notification applet for informing about package updates in Slackware and CLI tool for monitoring upgraded packages.
Making your backup drives into were-drives, transforming them into clones at will. WereSync incrementally backups up hard drives using rsync. Backups can be run while you use your computer. As icing on the cake, you can boot your clone just like your normal computer.
GNU wget is a HTTP and FTP downloading and mirroring tool for the command line. It provides various options and complete HTTP support. It supports REST and RANGE requests for partial and continuous downloads, can use wildcards for mirroring complete websites, converting HTML references to relative links, use HTTP cookies, proxies, persistent connections, background processing, and can compare files prior downloading.
linuxclone makes a bootable clone of your running Linux system onto a second (USB) disk. Of course, you can make clones or backups with a lot of tools like rsync, dd, clonezilla, etc, but they will not be bootable without modifications. With linuxclone you can copy YOUR system onto a small USB stick, to carry it with you everywhere. And you can very easily update it with the same command. linuxclone has support for DOS/MBR, UEFI/GPT, exclude and include lists.
FreeFileSync allows comparing and synchronizing local file folders. It's performant and without GUI complexity. It detects moved and renamed files, detect conflicts, can operate on locked files, understands symlinks, allows automatic syncing, copyies extended file permissions (NTFS), and it's cross-platform.
rsync is a replacement for rcp (and scp) that has many more features. It uses the "rsync algorithm" which provides a very fast method for remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.